Condensed Systems of Low Dimensionality

The NATO Special Programme Panel on Condensed Systems of Low Dimensionality began its work in 1985 at a time of considerable activity in the field. The Panel has since funded many Advanced Research Workshops, Advanced Study Institutes, Cooperative Research Grants and Research Visits across the breadth of its remit, which stretches from self-organizing organic molecules to semiconductor structures having two, one and zero dimensions. The funded activities, especially the workshops, have allowed researchers from within NATO countries to exchange ideas and work together at a period of development of the field when such interactions are most valuable. Such timely support has undoubtedly assisted the development of national programs, particularly in the countries of the alliance wishing to strengthen their science base. A closing Workshop to mark the end of the Panel's activities was organized in Marmaris, Turkey from April 23-27, 1990, with the same title as the Panel: Condensed systems of Low Dimensionality. This volume contains papers presented at that meeting, which sought to bring together chemists, physicists and engineers from across the spectrum of the Panel's activities to discuss topics of current interest in their special fields and to exchange ideas about the effects of low dimensionality. As the following pages show, this is a topic of extraordinary interest and challenge which produces entirely new scientific phenomena, and at the same time offers the possibility of novel technological applications.

Semiconductor Optical Properties.- 2Deg and Electron-Hole Plasmas.- Optical Spectroscopy of the Two-Dimensional Electron Gas in GaAs Quantum Wells.- Optical Detection of the Integer and Fractional Quantum Hall Effects in GaAs at Millikelvin Temperatures.- Raman Light Scattering from Plasmons in Modulation Doped Quantum Wells.- Condensation of Confined Electron-Hole Plasmas.- Cooling of an Electron Hole Plasma in GaAs.- Magneto-Optics.- Magneto-Optics of [111] GaAs/GaAlAs Quantum Wells.- Spin Memory of Photocreated Carriers in Quantum Wells in High Magnetic Fields.- Semimetal-Semiconductor Transition in II–VI Compound Type III Superlattices.- Quantum Wells and Superlattices.- Optical Properties of Semiconductor Systems of Low Dimensionality.- From Quantum Well Exciton Polaritons to One-Dimensional Excitons.- The Optical Properties of Narrow-Gap Low Dimensional Structures.- Optical and Magnetic Properties of Diluted Magnetic Semiconductor Heterostructures.- Time-Resolved Photoluminescence Determination of Xz-Xx y Energy Separation and Xz State Lifetimes in AlGaAs/AlAs Type II Multiple Quantum Wells.- Mechanism of ?-X Electron Transfer in Type II (Al)GaAs/AlAs Superlattices and Multiple Quantum Well Structures.- Spectroscopic Studies of Miniband Structure and Band Mixing in Superlattices.- Saddle-Point Excitons and Fano Resonances in Semiconductor Superlattices.- Semiconductor Transport.- Electronic.- Perspectives on Electron Transport in Semiconductor Structures.- Folklore and Science in High Mobility MOSFETs.- Theory of Electronic Transport in Low Dimensional Semiconductor Microstructures.- Transport Properties of AlxGal-xAs/GaAs Heterostructures: Theoretical Results.- Electron Energy Relaxation and Charge Buildup Effects in Resonant Tunneling Devices.- Saturated Mini-Band Transport in Semiconductor Superlattices.- Intersubband Carrier Scattering in Multiple Quantum Well Structures.- Electron-Phonon Interaction in Two-Dimensional Electron Gases.- Mesoscopic.- Oscillating Transverse Voltage in a Channel with Quantum Point Contact Voltage Probes.- The Suppression of Random Telegraph Noise in a Point Contact.- Quantization and Resonant Structure in Low Dimensional Structures.- Ballistic Transport Through a Quantum Point Contact.- Potential Fluctuations in Heterostructure Devices.- Semiconductor Strained Layers.- Growth and Relaxation.- Synthesis, Properties and Applications of Strained Layers and Heterostructures.- In Situ Investigation of the Low Pressure MOCVD Growth of Lattice-Mismatched Semiconductors using Reflectance Anisotropy Measurements.- Epitaxial Growth of Strained III/V Semiconductor Alloys — Composition and Microstructure.- Strain Relaxation and Influence of Residual Strain in GaAs and (AlGa)As/GaAs Heterostructures Grown on (100) Si by Molecular Beam Epitaxy.- Strain Relaxation by Misfit Dislocations.- Group IV.- Strained Layer Heterostructures and Superlattices based on Group IV Elements.- Raman Spectroscopy of Si-Ge Atomic Layer Superlattices.- Combined Effect of Strain and Confinement on the Phonon Spectra of IV/IV Superlattices: Towards a Quantitative Description.- Electronic and Optical Properties.- Electronic Structure and Optical Properties of Strained Layer Superlattices.- Magnetospectroscopy of MOCVD Grown GaInSb/GaSb Strained Layer Quantum Wells.- Highly Strained InAs/GaAs Short Period Superlattices.- Heterojunction Band Discontinuities for Pseudomorphically Strained InxGal-xAs/AlyGal-yAs Heterointerfaces.- Electronic Properties and Stability of Semiconductor Heterostructures.- Microscopic Theory of Semiconductor Superlattices.- Devices.- Strained Layer Lasers in the InGaAs/GaAs/AlGaAs Heterostructure System.- GaAs on InP Based Optoelectronic Integrated Circuits for Optical Switching Networks.- Strained Layer Lasers and Avalanche Photodetectors.- The InGaAlAs System for Strained and Unstrained Heterostructures on InP Substrate.- Materials, Device and Circuit Properties of AlInAs-GaInAs HEMTs.- Strain Induced Band Structure Modifications in Semiconductor Heterostructures and Consequences for Electronic and Optical Devices.- Electrical Characterization of SiGe Heterojunction Bipolar Transistors (HBTs) Formed by Molecular Beam Epitaxy (MBE).- Layered Compounds.- Physics and Chemistry of Layered Compounds.- The Graphite Intercalation Compounds and Their Applications.- Modification of Electronic Transport Properties by Intercalation Reactions.- Molecular Dynamics Simulation of Ion Transport in Beta”-Alumina.- Layered Cuprates with Double Copper Layers: Relationships Between Structure, Nonstoichiometry and Superconductivity.- Is There Spin on the Quasiparticles in the Copper Oxygen Planes of High Temperature Superconductors?.- Low Dimensional Molecular Structures.- Low Dimensional Molecular Conductors: Various Aspects of their Physical Properties.- Conduction in Langmuir-Blodgett Films.- Langmuir-Blodgett Films of Potential Organic Rectifiers.- Transport in Low Dimensional Organic Structures.- Organized Monolayer Assemblies in the Search for Biomimetic Machines.- Group Photo.- Materials Index.