High magnetic fields have been an important tool in semiconductor physics for a long time. The area has been growing very rapidly since quantum effects in silicon field-effect transistors have become of practical interest. Since the discovery of the quantum Hall effect by Klaus von Klitzing in 1980, this subject has grown exponentially. The book contains 42 invited papers and 37 contributed papers which were presented at the 7th of the traditional Würzburg conferences. For the area of high magnetic fields applied in semiconductor physics recent results are discussed, and the state-of-the-art is reviewed. More than 50% of the papers concern two-dimensional electronic systems. Other subjects of current interest are magneto-optics and magneto transport in three-dimensional semiconductors. Special attention has been paid to the rapidly growing field of semimagnetic semiconductors.

Inhalt

I Integral Quantum Hall Effect, Localization in High Magnetic Fields, Density of States.- Localization in Landau Levels of 2D Systems and the Quantum Hall Effect.- Scaling of the Integral Quantum Hall Effect.- Percolation Approach to the Quantum Hall Effect.- Electrons in a Random Potential and Strong Magnetic Field: Lowest Landau Level.- Calculation of the Conductivity of Two-Dimensional Disordered Systems in the Presence of a Strong Magnetic Field.- Quantum Hall Effect: From the Winding Number to the Flow Diagram.- Scattering Approach to the Quantum Hall Effect.- The Quantum Mechanical Hall Effect.- Density of States of Landau Levels in Two-Dimensional Systems from Activated Transport, Magnetocapacitance and Gate Current Experiments.- A Statistical Model for Inhomogeneities Explaining the Apparent Density of States Between Landau Levels of a Two-Dimensional Electron Gas.- The Density of States of a Two-Dimensional Electron Gas in a Perpendicular Magnetic Field Under the Influence of a Correlated Random Potential.- Frequency- and Temperature-Dependent Conductivity in the Quantum Hall System.- Ground-State Energy of Two-Dimensional Electron Solids in High Magnetic Fields.- Energy Spectra of Interacting Two-Dimensional Electrons in a Magnetic Field.- High-Frequency Conductivity in the Quantum Hall Effect Regime.- A New Approach to the Quantum Hall Effect.- A New Quantum Effect in the Transverse Magnetoresistance of Two-Dimensional Conductors with a Narrow Constriction in the Conducting Channel.- A Model for the Quantum Effects Observed in the Transverse Magnetoresistance of Two-Dimensional Conductors with a Constricted Channel.- Photoexcited Quantum Hall Behavior in Modulation Doped GaAs/AlGaAs Heterostructures: Parallel Conduction and Subthreshold Photoeffects.- Quantum Hall Effect in Bicrystals of p-Hg0 75Cd0 23Mn0 02Te.- High-Precision Quantum Hall Effect Experiments at the National Institutes.- II Fractional Quantum Hall Effect.- Fractional Quantum Hall Effect in Silicon MOSFETs.- Recent Advances in the Study of the Fractional Quantum Hall Effect.- Activation Energies of the Fractional Quantum Hall Effect in GaAs/AlGaAs Heterostructures.- Fractional Quantum Hall Effect of p-Type GaAs-(GaAl)As Heterostructures in the Millikelvin Range.- The Two-Dimensional Density of States at Fractional Filling Factors.- Possible Fractional Filling Factors in the Quantum Hall Effect at Temperatures up to 4.2 K.- III Heterostructures and Superlattices: Optics.- Tunneling Cyclotron Resonance in Semiconductor Superlattices.- Thermodynamic and Magneto-Optic Investigations of the Landau Level Density of States for 2D Electrons in GaAs.- Magneto-Luminescence in Modulation-Doped AlGaAs-GaAs Multiple Quantum Well Heterostructures.- Magneto-Luminescence in GaAs-(GaAl)As Superlattices.- Magneto-Optics in GaAs-GaAlAs Quantum Wells.- Inelastic Light Scattering in Two-Dimensional Systems in High Magnetic Fields.- High Magnetic Field Studies of Confined Impurities in Semiconductors.- Determination of the Electric Subband Energies and Wavefunctions in GaAs-AlGaAs Heterostructures Using Resonant Subband-Landau-Level Coupling.- Cyclotron Resonance in n-GaAs/GaAlAs Heterojunctions.- Cyclotron Resonance in InSb in Crossed Electric and Magnetic Fields.- Electronic Excitations in Laterally Microstructured AlGaAs-GaAs Heteroj unctions.- Landau Level Width and Cyclotron Resonance in 2D Systems.- Hole Cyclotron Resonance in p-Type GaAs-AlGaAs Superlattices in High Magnetic Fields.- Magnetoplasma Resonance in the Dynamic Conductivity of a Type I Superlattice.- Radiative Recombination of Two-Dimensional Electrons with Nonequilibrium Holes in Si MOS-Structures.- IV Heterostructures and Superlattices: Transport, Bandstructure.- Theory of p-Type Inversion Layers in Magnetic Fields.- Transport Properties of p-Type GaAs-(GaAl)As Heteroj unctions in High Magnetic Fields.- Two-Dimensional Hole Gas in GalnAs/InP Heteroj unction.- Magnetotransport in the ?-Doping Layer.- Magnetotransport and Photoconductivity of IV-VI Compound Superlattices.- Oscillatory Current-Voltage Characteristics and Magnetocapacitance Effects in Single Barrier n+GaAs/(AlGa)As/n-GaAs/n+GaAs Heterostructures.- Aperiodic Quantum Magnetoresistance Oscillations in Submicron n+GaAs Wires.- Magnetic Crossover in Narrow 2D Electron Systems.- Resonant 2D Magnetopolarons in Accumulation Layers on n-Hg0 8Cd0 2Te.- Phonon Scattering in Multiquantum Well Structures.- Tunneling in Silicon Inversion Layers in High Magnetic Fields.- Germanium Bicrystals in High Magnetic Fields.- V Metal-Insulator Transition.- The Metal-Insulator Transition in n-Type Silicon in High Magnetic Fields.- Anderson Transition Induced by Strong Magnetic Fields.- Electron Transport in the Magnetically Induced M-I Transition in InSb.- Magnetic Field Induced Metal-Nonmetal Transition in GaAs-GaAlAs Heterostructures with a Spacer.- VI Semimagnetic Semiconductors, IV-VI Materials.- High Field Investigations on IV-VI Semiconductors.- Recent Developments in Semimagnetic Semiconductors in Warsaw.- Recent High-Field Work on Diluted Magnetic Semiconductors.- Magnetic Field Dependence of the Acceptor Binding Energy in Open-Gap HgMnTe: Photo- and Magnetoconductivity.- Spin Modulated Energy State by Shubnikov-de Haas Analysis in Hg1-x-yCdxMnyTe at High Magnetic Fields.- Phase Differences Between Quantum Oscillations of the Magnetoresistance and the Hall Effect in Hg1-xMnxTe and Hg1-xCdxTe.- Magnetic Field Driven Insulator-to-Metal Transition in Semimagnetic Semiconductors.- Magnetospectroscopy of Semimagnetic Zn1-xMnxSe.- VII Magneto-Optics in 3D Systems.- Nonlinear Spectroscopy of Narrow Gap Semiconductors in High Magnetic Fields.- Energy Relaxation of Hot Carriers in GaAs in a Strong Magnetic Field Studied with Picosecond Photoluminescence.- Population Inversion and Anomalous Voigt Effect Due to JxH Force in InSb.- Interband Magneto-Optics in Narrow-Gap Semiconductors.- Far Infrared Thermomodulation in Hg0 8Cd0.2Te.- VIII Magneto-Transport in 3D Systems, Bandstructure.- Theoretical Aspects of Wigner Condensation.- On the Magnetic Field Induced Electron Condensation in n-HgCdTe.- High Field Magnetoresistance of Organic Conductors and Disordered Metals.- The Magnetophonon Effect in Narrow Gap Semiconductors.- Hopping Conduction in n-InP in a Magnetic Field.- Conduction Electrons in Bulk GaAs at High Magnetic Fields.- How Strong Are Resonant Polaron Effects in 2D and 3D Semiconductor Systems?.- IX Very High Field Work.- The State of the Art of Generating Pulsed Magnetic Fields.- Recent Investigations on Semiconductors in the 100 Tesla Range.- Davydov Splitting of Excitons in Anthracene Single Crystals in Megagauss Fields.- Index of Contributors.