Physics

Structure, Dynamics, and Phase Transitions of Suspensions of Polymer Spheres in Equilibrium and Nonequilibrium States

The unique length and time scales characteristic of aqueous suspensions of charged polymer spheres are exploited to study the basic equilibrium and nonequilibrium properties of strongly interacting spherical particle systems. Experiments include optical microscopy and light scattering intensity fluctuation spectroscopy, techniques that have already been developed, as well as novel applications of other methods including laser trapping of particles and neutron scattering. Studies of shear induced structure changes will be extended to include model, which is used to describe the absorption of atoms on a smoothly-cut surface of a crystal, contains the integrable case as a very special line. It is proposed to study the significance of the exact results, and to translate them into language more transparent to physicists.

Sponsor: National Science Foundation
PIs: Helen Au-Yang and Jacques Perk

Theory of Bistable Optical Cells and Lasers Based on Thin Semiconductor Films

The aim of this project is the theoretical development of high-quality devices for optical information processing based on new physical principles.

Sponsor: North Atlantic Treaty Organization
PI: Donna Bandy

Dynamic Carrier Heating Effects in a Semiconductor Laser

Spatio-temporal effects are studied. The investigation will lead to the development of novel, compact laser sources with wide applicability in optical devices.

Sponsor: National Science Foundation
PI: Donna Bandy

Research Careers for Minority Scholars in Condensed Matter Physics

Oklahoma State University has initiated a Research Careers for Minority Scholars program to increase the representation of blacks, American Indians, and Hispanics in the field of condensed matter physics. The program consists of three mutually supporting phases. The first is an undergraduate research internship for students in the summer between their junior and senior years. The second phase is the "bridging summer," immediately following their completion of the baccalaureate degree to provide a continuous path from undergraduate to graduate study, continue their involvement in research, and give them a head start toward completion of a thesis problem. The third phase is support for their first year of graduate study, including opportunities for them to serve as role models for minority undergraduates. The program will emphasize research in the properties of optical materials, an area with great industrial as well as academic interest. OSU is one of the leading American research centers in optical materials. All phases of the program will provide, through attendance at scientific conferences and colloquia, the opportunity to interact with the larger scientific community as well as the OSU faculty, staff, and students. This will aid the minority scholars in building their network within the physics community; this is important in their becoming successful and productive research physicists.

Sponsor: National Science Foundation
PI: George Dixon

Research Experience for Undergraduates--Optical Materials and Lasers

A summer program providing research experience for undergraduates in the area of optical materials and lasers. The materials to be investigated in this program will include laser-host, electro-optic, photorefractive, and colloidal materials with present or potential applications in optical systems. The participants are actively involved in nine related projects involving crystal growth, time-resolved site-selection spectroscopy, laser instabilities, optical characterization of quantum well structures, thermal and electrical transport properties, light scattering, and thermally and optically stimulated luminescence.

Sponsor: National Science Foundation
PI: George Dixon

DOE EPSCoR Traineeship Program

Oklahoma's three research universities--Oklahoma State University, the University of Tulsa, and the University of Oklahoma--have established a program of graduate traineeships for graduate study and research by outstanding students in energy-related fields. Petroleum research is emphasized at the University of Tulsa, natural gas research at the University of Oklahoma, and advanced manufacturing and materials at Oklahoma State University.

Sponsor: U.S. Department of Energy
PI: George Dixon

MBE Growth and Characterization of GaN/AlN Structures under Hydrostatic Pressure

This funding will provide doctoral training for one graduate research assistant and will augment a parent Air Force Office of Scientific Research-funded research program in epitaxial nitride materials. The research will concentrate on molecular beam epitaxial (MBE) growth of zinc-blende thin films of GaN, AlN, and several combinations of these two basic materials on closely lattice-matched Si and other substrates, and optical investigation of the expitaxial materials under hydrostatic pressure. The student trained under this program will have a unique opportunity to acquire state-of-the-art expertise in both MBE materials synthesis and advanced optical characterization methods.

Sponsors: Air Force Office of Scientific Research (AASERT)
PIs: Robert Hauenstein and J.J. Song

Ab initio Self-Consistent Field Calculations on Mn-Related Defects in CaF2

The absorption spectrum of the substitutional manganese impurity in calcium fluoride was modeled using a [MnF8]6- cluster. After embedding this cluster in a point ion field designed to reproduce the Madelung potentials within the quantum cluster, a series of MCSCF calculations were performed. The results showed that agreement within the experiment could be obtained after a rigid shift of the spin 3/2 levels by -0.647 eV. The results of a ligand field analysis for the eight-coordinated isolated Mn impurity showed a narrowing in energy of the multiple terms with respect to the six-coordinated Mn. The crystal field parameter increased from 420 cm-1. The external field was found to play a more important role in the Mn-perturbed F-center of "point gaussians." UHF and MCSCF calculations on the Mn-perturbed F-center cluster showed that the ground state of the system is a spin 2 state with the lowest spin 3 state 0.17 eV above this. The MCSCF results show the d-to-d transitions agree well with the observed absorption peaks near 300 nm and 400 nm. A peak at 540 nm cannot be explained by this cluster and may be due to Mn-perturbed M or M+ centers.

Sponsor: State of Oklahoma
PIs: Anthony C. Lewandowski and Timothy Wilson

Band Offsets of the ZnSe-ZnS Heterostructures

The valence and conduction band offsets for the ZnSe-ZnS heterostructures are determined from ab initio nonself-consistent factorized LCAO calculations using the core-level model of Wei and Zunger and the frozen-potential model of Christensen. The Zn 3d states were treated as fully relaxed states during the electronic structure calculations. The valence band offset is found to be on the order of 1.0 eV, indicating a strong confinement of the holes in the ZnSe quantum wells. The conduction band offset, though, is found to be small and indicates a weak confinement of the electrons. These results suggest that the ZnSe-ZnS heterostructures do not form either a strong type-I or type-II superlattice.

Sponsor: State of Oklahoma
PIs: T. Scott Marshall and Timothy Wilson

Crystal Growth Laboratory

The Crystal Growth Laboratory, which has been in operation for the past 20 years, is a support facility for the Physics Department's Materials Group and for the Laser Center. The lab is a unique facility. It is one of the few crystal growth facilities in the U.S. that can provide a "custom" crystal growth service. This service usually takes the form of growing doped crystals such as rare earth doped LiYF4 which are not commercially available. OSU researchers are currently able to grow a wide variety of fluoride perovskite and scheelite structure compounds, alkali halides, and oxides such as Bi12GeO20 and LiNbO3. Most of the crystals can be produced with rare earth and/or transition metal ion dopants. While most production has been used in-house, OSU frequently supplies custom doped crystals to workers in industrial and government laboratories and at other universities.

Sponsor: State of Oklahoma
PI: Joel Martin

An Investigation of Persistent Photorefractive Gratings in Chromium-Doped Bismuth Germanium Oxide

Exploratory research on persistent holographic gratings for optical correlators and storage devices.

Sponsor: Center for Photonic Materials and Devices (NSF-EPSCoR)
PI: Joel Martin

Advanced Materials for Photonics, Lasers, and Electro-Optics

The establishment of an interdisciplinary cluster in Advanced Materials for Photonics, Lasers, and Electro-Optics. The cluster significantly increases the capabilities in the field by expanding the program into the Departments of Chemistry and Electrical and Computer Engineering, and by making available synthesis and characterization facilities to extend our research into new classes of optical materials. The interdisciplinary nature of the project will allow the application of a number of different tools to the study of these materials, broaden the experience of the students participating in the project, and provide feedback between the growth and characterization areas of the project.

Sponsors: National Science Foundation (EPSCoR) and State of Oklahoma
PIs: Joel Martin, George Dixon, Stephen McKeever, and Robert Hauenstein
Elizabeth Holt and Edward Knobbe (Department of Chemistry)

Development of a Pulsed Optically Stimulated Luminescence Personal Dosimetry System Based on Aluminum Oxide

Research and development to define the parameters necessary to establish an accredited pulsed-OSL dosimetry system, based on anion-deficient aluminum oxide.

Sponsor: Landauer, Inc.
PI: Stephen McKeever

Theoretical Studies in Weak, Electromagnetic, and Strong Interactions

This project is the continuation and extension of work previously done with Department of Energy support. Several specific research projects are included covering a wide area of current high energy physics research. Among the projects are an effort to understand the origin of the fermion masses and the mixing angles in the framework of supersymmetric grand unified theories with an extra U(1) family symmetry or in the superstring framework, some new ideas regarding the Higgs boson physics and the top quark decays, searching for non-minimal supersymmetry at the supercolliders, rare decays like bs¥ in supersymmetric theories, production of high spin particles in colliders, S,T,U formalism for an extended gauge group, calculating cross sections and decay widths in higher order perturbative QCD, and estimating perturbative coefficients in Quantum Field Theory, Condensed Matter Theory, and Statistical Physics.

Sponsor: U.S. Department of Energy
PI: Satyanarayan Nandi

Collider Physics

This project involves new physics to be discovered in the present and upcoming Leptonic (such as Tev Linear colliders) and Hadronic (such as Fermilab Tevatron, and LHC). The project involves new ways to discover the Higgs bosons, to identify the mechanisms behind Electroweak symmetry breaking, and to identify the physics behind the Standard Model, such as new gauge boson or new fermions and supersymmetry.

Sponsor: State of Oklahoma
PI: Satyanarayan Nandi

Computers as an Analytic Tool in Mathematical Physics

The advent of personal computers with supercomputer power and algebraic programming languages has opened up a wide variety of problems that were hitherto unfeasible. Special attention will be paid to problems that allow exact or extremely accurate numerical solutions with results from brute-force numerical supercomputer calculations. Besides being able to do new computations and to develop new software, this allows extensive testing of existing software packages, which are, in view of their size, almost never free of bugs. This project involves state-of-the-art technology and should be expected to help modernize the curriculum of physics courses at OSU.

Sponsor: State of Oklahoma
PI: Jacques Perk

Advanced Light Microscopy: Two-Photon Fluorescence

The development of a new light microscope based on the principle of two-photon absorption and fluorescence. The long-term goal of the project is the development of an instrument that is not only useful to the biological researcher, but that is also reliable and simple to operate. While two-photon fluorescence microscopes currently exist, they are based on laser technology whose long-term reliability is questionable. This project addresses that drawback and outlines the development of new laser technology suitable for application in an instrument intended for use by non-specialists.

Sponsor: OCAST Health Research Program
PI: Steven Schafer

Medical Applications of Diode Lasers

Investigation of selective photoablation of contaminated traumatic wound surfaces using portable diode laser energy.

Sponsor: Surgimedics (Air Force STTR)
PI: Steven Schafer

Computational Studies of Biological Membranes

The researchers involved in this project are using atomic resolution molecular dynamics and Monte Carlo methods to study the states and motions of membrane molecules. Of particular interest are the interfacial regions between the membrane surface and the aqueous medium, and between membrane lipid and cholesterol. A major goal is to construct a theoretical model which describes all the known thermodynamic phases of lipid membranes.

Sponsor: State of Oklahoma
PI: H. Larry Scott

Computational Studies of CVD Diamond Film Growth

This project involves theoretical studies of low-pressure diamond-film growth by chemical vapor deposition and combustion methods. The project consists of two parts. The first part focuses on investigations of the individual chemical reactions involving gas-phase hydrogen, acetylene, and associated radicals with a diamond surface. The aim is to derive a set of reaction rate constants and probabilities for all relevant processes involved in diamond-film growth. This is to be followed by the development of appropriate phenomenological models of the growth pathways as a function of the experimental conditions. In the second part of the project, a kinetic Monte Carlo simulation of the film deposition process will be carried out. The Monte Carlo simulations will be designed around the results obtained in the molecular dynamics studies. This will permit the design of a model which explicitly considers the most important elementary molecular events using accurately determined event probabilities. It is anticipated that the Monte Carlo simulations will have significant predictive capabilities which will be useful to the experimentalists in the Diamond Research Group at OSU.

Sponsor: National Science Foundation
PIs: H. Larry Scott
Lionel Raff (Department of Chemistry)

Structure and Evolution of Supernova Remnants

The goal of this research program is to make significant advances in understanding how the structure and evolution of supernova remnants (SNRs) are influenced by the interactions of both the SNRs and their progenitors with the ambient interstellar medium. Theoretical calculations will show how SN progenitor stars alter their environments through winds, sudden mass loss, and ionizing radiation fields. Observational results will guide the formulation of theory.

Sponsors: International Astronomical Society
PI: Peter Shull

Tunable Laser Investigations of UV-Blue Nitride Quantum Structures

Investigation of optical and quantum structure properties of GaN-based materials for blue-to-UV light emitting applications. A number of physical properties and characteristics of nitride heterostructures relevant to light-emitting are being investigated, including carrier confinement effects, luminescence efficiency, and band alignment at heterointerfaces.

Sponsors: Office of Naval Research and Oklahoma State Regents for Higher Education
PI: J.J. Song

Laser Spectroscopy of Optical Materials

This funding augments the support of a research project, "Development of Nonlinear Optical Materials and Processes for Laser Hardening of Sensors," which is currently funded by the Advanced Research Projects Agency through the Army Center for Night Vision and Electro-Optics. The funding will allow the addition of two graduate research assistants who will work on thermal lensing experiments on nonlinear glass materials for optical limiters.

Sponsor: Army Research Office (EPSCoR)
PI: J.J. Song

Spectroscopic Studies and Characterization of Excitonic States in Semiconductor Quantum Wells and Superlattices

Continuation of optical studies in III-V and II-VI semiconductor quantum wells and superlattices. A variety of optical phenomena associated with carrier confinement and quantum size effects will be investigated using both pico- and femtosecond lasers, and diamond anvil pressure cells. In particular, phonon coupling, excitonic effects, and zone boundary optical transitions in superlattices, distinct from those in quantum wells, will be investigated.

Sponsor: Office of Naval Research
PI: J.J. Song

Optical Characterization of II-VI Semiconductor Materials

Optical properties of various II-VI quantum structures grown by molecular beam epitaxy will be investigated. Laser spectroscopic techniques, using both pulsed and continuous wave lasers, will be employed. The samples will include CdTe/HgCdTe, CdMnTe/HgTe single heterostructures and superlattices grown at different MBE conditions. The interface quality, quantum confinement effects, stimulated emission, and impurity/dopant-related phenomena will be systematically investigated over a large temperature range.

Sponsor: Hughes Research Laboratories
PI: J.J. Song

MBE Growth and Characterization of Zinc Blende GaN and GaN/AlN

This is a project to study the molecular beam epitaxial (MBE) growth and optical properties of cubic (zinc blende) GaN, AlN, and GaN/AlxGa1-xN epitaxial materials, and to demonstrate the feasibility of these materials for blue and UV optoelectronics applications through the fabrication of light-emitting diode (LED) devices. The emphasis of the project is on MBE growth conditions and materials characteristics, which are requisite to devise quality cubic nitride semiconductors for optoelectronic applications.

Sponsor: Air Force Office of Scientific Research
PIs: J.J. Song and Robert Hauenstein

Ultrafast Pulsed Laser Applications to Photonic Device Materials and MBE Growth Research

A project to establish a tunable ultrafast femtosecond laser pulse generation and streak camera detection system with the goal of applying them to high technology materials and optoelectronic device research.

Sponsors: Air Force Office of Scientific Research and Oklahoma State Regents for Higher Education
PIs: J.J. Song and Robert Hauenstein

Development of ZnO Substrate for Nearly Lattice Matched Nitride Epitaxy

The purpose of this research is to provide lattice matched substrates that will minimize strain induced effects.

Sponsor: Eagle-Picher
PIs: J.J. Song and Robert Hauenstein

MBE Growth, Microstructure, and Laser Investigation of Nitride Heterostructures to Novel Blue-to-Photonic Materials

A joint proposal between two research groups (material growth and optical characterization) to investigate epitaxial nitride heterostructures as novel blue to UV photonic materials. This program has two objectives: to study and control the molecular beam epitaxial (MBE) growth process, with the goal of optimizing optical quality in nitride heterostructures; and to investigate quantum structure properties and optical phenomena of as-grown materials which are relevant to photonic, in particular, to blue-to-UV light-emitting applications.

Sponsors: DEPSCoR and Oklahoma State Regents for Higher Education
PIs: J.J. Song and Robert Hauenstein

Nonlinear Optical Studies of Wide Gap II-VI Semiconductor Compounds for Device Applications

The investigation of nonlinear optical properties of technologically important wide-gap II-VI semiconductors with energy gaps in the blue range. Optically pumped laser action will be studied using tunable nanosecond lasers with a goal of applying it to blue semiconductor laser development. Nonlinear optical mixing experiments will also be carried out with these samples for these applications in photonic devices such as switches. This funding allows the addition of graduate research assistantships for Ph.D. students.

Sponsor: Advanced Research Projects Agency (EPSCoR)
PI: J.J. Song

Optical and Pressure Studies of Semiconductor Quantum Wells

Funding to provide doctoral training for two graduate research assistants on a research project in the area of optical, structural, and electronic properties of semiconductor quantum well structures grown by molecular beam epitaxy (MBE). The main thrusts of the research are in the study of interface as well as confined and propagating phonons in multi-quantum-wells (MQWs) and superlattices (SLs) using pico-femtosecond lasers; and in investigations of pressure-induced changes of MQWs and SLs under hydroscopic pressures.

Sponsors: Office of Naval Research
PI: J.J. Song

Nanostructure Optoelectronic Materials and Device Research Using Tunable Ultrafast Systems

Establishment of a multifunctional facility focused on a tunable femto/picosecond laser system. The facility is particularly well-equipped to investigate wide gap semiconductor materials and optoelectronic devices operating in the UV-visible range.

Sponsors: Department of the Army and Oklahoma State Regents for Higher Education
PI: J.J. Song

Optical Evaluation of MOCVD Nitride LED and Laser Structures

Characterization of nitride structures provided by Honeywell.

Sponsor: Honeywell
PI: J.J. Song

Ultrafast Pulsed Laser Investigations of GaN Based Semiconductors for Device Applications

An investigation of the properties of wide-gap nitrides using ultrafast tunable laser sources. The program will lay the groundwork for many future optical, electrical, and opto-electronic investigations in wide-gap nitrides.

Sponsors: DEPSCoR and Oklahoma State Regents for Higher Education
PI: J.J. Song

Nonlinear Optical Investigations of Wide Bandgap Semiconductors for Optoelectronic Device Applications

Supplemental funding to provide doctoral graduating training for a research assistant in the study of optical nonlinearities of wide bandgap compound semiconductors.

Sponsor: Advanced Research Projects Agency (AASERT)
PI: J.J. Song

Optical and Electrical Investigations of Widegap Nitrides for Applications in Epitaxial Growth Devices

Supplemental funding to provide doctoral training for a research assistant in the study of epitaxial nitride materials and ultrafast pulsed laser applications.

Sponsor: Air Force Office of Scientific Research (AASERT)
PI: J.J. Song

US-Korea Cooperative Research in Nonlinear Spectroscopy of Semiconductor Heterostructures

An investigation of recently found strong femtosecond nonlinearities in wide bandgap materials that are of increasing technological importance.

Sponsor: National Science Foundation
PI: J.J. Song

Polymer/Microemulsion/Colloid Interaction

Support of research in studies of structures, interactions, diffusion, and aggregation in colloid suspensions, microemulsions, polymer solutions and in their mixtures, using laser light and neutron scattering techniques.

Sponsor: Exxon Research and Engineering
PI: Penger Tong

Scattering Experiments in Turbulent Raleigh-Benard Convection

Laser light scattering experiments to study statistical properties of the local velocity and the local vorticity fields of high Rayleigh number turbulent convection in water. These measurements aim at finding and testing new scaling laws in velocity and vorticity statistics over varying Rayleigh numbers and length scales in turbulent core regions and near the boundary. The experiments will provide a body of reliable data to test current theories for turbulent convection.

Sponsors: National Science Foundation and Oklahoma State Regents for Higher Education
PI: Penger Tong

Light Scattering Studies of Relative Motions of Solid Particles in Turbulent Flows

A program of laser light scattering experiments to study turbulent motions of solid particles whose density is different from the carrier fluid. The aims of the project are to understand the dynamics of the solid particles in a turbulent tunnel flow and in turbulent thermal convection, and to study concentration fluctuations of the particles in the turbulent flow fields. These experiments are of fundamental interest, and they are also relevant to many practical applications. Understanding the dynamics of the solid particles in turbulent flows and the new scattering techniques to be developed in the study will benefit studies of other two-phase flows, in which particles or droplets are deformable such as bubbles and polymer molecules.

Sponsor: National Aeronautics and Space Administration
PIs: Penger Tong
Walter Goldburg (University of Pittsburgh)

Studies of Particle Sedimentation by Novel Scattering Techniques

A program of laser light scattering experiments to study the sedimentation of heavy colloidal particles. The objectives of the project are to develop a new velocimetry technique which can be used aboard space shuttles, and use the technique on the ground to study velocity fluctuations of the settling particles. The experiments are of fundamental interest for understanding the gravity effects on the translational and rotational motions of particles, and they are also relevant to many practical applications. The new scattering technique to be developed will not just benefit the present study of colloidal sedimentation, but will also have myriad applications in the general area of the microgravity fluid physics.

Sponsors: National Aeronautics and Space Administration and Oklahoma State Regents for Higher Education
PIs: Penger Tong and Bruce Ackerson

Density Functional Theory of Intermolecular Forces

A theory of intermolecular forces within the framework of an energy function of the electron density has been developed. A "clean separation" of classical (electrostatic and induction) and quantum (exchange and dispersion) forces emerges in these considerations. Computer codes to carry out the calculations of these terms at various levels of approximations are now being developed and tested. Long-range goals include implementing formalism and computer codes as a general approach to calculating intermolecular forces.

Sponsor: State of Oklahoma
PI: Paul Westhaus

Permanent Holographic Gratings for Wavelength Division Filtering

A systematic investigation of the characteristics of composition and processing that underlie the nonlinear scattering in rare-earth activated silicate glasses to develop a physical basis for tailoring these media for the desired photorefractive properties and applications.

Sponsor: ARPA (DEPSCoR) and State of Oklahoma
PI: James Wicksted

Electronic Structure of the Lithium-Compensated Paramagnetic Iron Center in a-SiO2

The electronic structure of the lithium-compensated paramagnetic iron (S=5/2) center in a-quartz, designated the [FeO4/Li]a0 center, has been determined on the basis of first-principles, self consistent field (SCF) Hartree-Fock calculations. The ground state correlation energy was calculated through second-order, using many-body perturbation theory. The S=3/2 excited states were calculated using the Complete Active Space SCF (CASSCF) method. The center consists of an interstitial lithium charge compensator that lies on a crystalline twofold axis passing through adjacent silicon and substitutional iron ions, and exhibits C2 symmetry. The results show the ground state of this center to be 6A and the iron to have a 3d5 high spin configuration. They also show significant covalent bonding between the iron and its nearest neighbor oxygens, involving the [4sp3] hybrid orbitals of the iron ion. The effective ionic charge of the Fe ion in the ground state of this center is found to be ~+1.4. The calculations predict a relaxed ground state (6B), corresponding to the 3d6 configuration of the iron ion, ~3.7 eV above that for the 6A.

Sponsor: State of Oklahoma
PI: Timothy Wilson

Lattice-Embedded Multiconfiguration SCF Calculations of the Mn-Perturbed F-Center Defect in CaF2:Mn

Ab initio multiconfiguration self consistent field (SCF) embedded-cluster calculations have been made for the ground and excited states of the Mn-perturbed F-center (Mn/F) defect in CaF2:Mn. This defect has long played a central role in the understanding of absorption and emission characteristics of this material following irradiation.

Sponsor: State of Oklahoma
PI: Timothy Wilson

A Technique for Embedding Clusters in Ionic Crystals Using the GAUSSIAN 92 Quantum Chemical Program

A technique has been developed for embedding clusters of atoms, which are to be treated quantum mechanically, in ionic crystals by representing the external lattice by classical lattice-centered Gaussian charge distributions. The goal is to carry out ab initio self-consistent field calculations of the many-electron ground and excited states of finite clusters representing defects in an otherwise perfect crystal lattice.

Sponsor: State of Oklahoma
PI: Timothy Wilson

Possible New Mechanism for High Temperature Superconductor

The main theme of this project is to propose a new type of superconducting state in the two dimensional electron gas. This new type of superconductivity provides a possible mechanism for the high temperature (high TC) superconductor because of its 2D nature. This theoretical study is examining the possibility and the physical properties of this new state to provide a clear and definitive conclusion on this new superconducting state.

Sponsor: University Center for Energy Research
PI: Xincheng Xie

Theoretical Study of Photoconductive Properties in GaN Systems and Semiconductor Nanostructures

A research project to study, theoretically, the photoconductive properties in GaN samples and semiconductor nanostructures.

Sponsor: Center for Photonic Materials and Devices (NSF-EPSCoR)
PI: Xincheng Xie

Theoretical Study of Electron Interaction and Dissipation in Semiconductor Nanostructures

A project to study theoretical aspects of electron-electron and electron-phonon interaction effects on the quantum transport properties of semiconductor nanostructures such as quantum wires and quantum dots.

Sponsor: North Atlantic Treaty Organization
PI: Xincheng Xie