12th International CGrifereiite

High Magnetic Fields

in the Physics of

Semiconductors il

Volume 1

Wurzburg, Germany29 July-2 August 1996

Editors

G. Landwehr

W. Ossau

Physikalisches Institut der

University Wurzburg, Germany

^

UNIVERSITATSBiBUOTHEKHANNOVER

TECHNISCHE

.

INFORMATIONSBIBUOTHEK

H WoVl^Scientific —'

jfir Singapore•NewJersey *London • Hong Kong

CONTENTS

VOLUME 1

I. Quantum Hall Effects

A. Integer Quantum Hall Effect

1. Quantum Hall Effect at Finite Temperatures 1

D.G. Polyakov

2. axx and crxy Experiments Regarding High Frequency Scaling 11

in the Integral Quantum Hall Effect

W. Belitsch, R. Meisels, F. Kuchar, G. Weimann,W. Schlapp, V. Umansky, G. Hbin, K. Pierz

3. A Systematic Study of the Temperature Dependence of Quan- 15

turn Hall Plateaux Widths in High Mobility Back-Gated

GaAs-(Ga,Al)As 2DEGs

P.J. Gee, J. Singleton, M.P. Grimshaw, D.A. Ritchie,G.A.C. Jones, J.H. Burroughes

4. High-Field Spin-Polarization Transition in the Landau Bands 19

of Quasi 2D Electron Gases with Strong Lateral Modulation

F. Petit, M. Hayne, B. Etienns

5. Spectroscopy of Two-Dimensional Electronic Systems in Strong 23

Magnetic Fields with Monochromatic Phonons

U. WlESNER, S. ROSHKO, W. DlETSCHE, K. VON KLITZING,

K. Eberl

6. Surface Acoustic-Wave Attenuation by a Two-Dimensional 27

Electron Gas in a Strong Magnetic Field

A. Knabchen, Y. Levinson, O. Entin-Wohlman

7. Integer Quantum Hall Effect in InGaAs/InP Heterostructures 31

at Microwave Frequencies

R. Greiser, A. Brensing, J. Pillath, W. Bauhofer,

V. Harle, F. Soholz, H. Hardtdegen

vii

VIII

8. Electron-Electron Interaction and Percolation Metal-Insulator- 35

Transition in the Quantum Hall Regime

H. Nielsen, P. Alstrom, P. Jorgensen

9. Multifractality of the Quantum Hall Wavefunctions in Higher 39

Landau Levels

T. Terao, T. Nakayama, H. Aoki

10. Unexpected Stability of the Quantum Hall Effect Against 43

Dissipation

F. Gagel, K. Maschke

11. Level Statistics in the Quantum Hall Regime 47

M. Batsch, L. Schweitzer

12. Collapse of Spin Splitting in a Two-Dimensional Electron Gas 51

Near Silicon Vicinal Surface in Quantum Hall Effect Regime

G.M. Gusev, Z.D. Kvon, A.A. Shashkin,

V.T. Dolgopolov

13. Quantum Hall Effect and Valley Degeneracy in (001) Si MOS- 55

FETs Under Uniaxial Stress

J. Lutz, F. Kuchar

14. Coulomb Proximity Phenomena in Two-Dimensional Corbino 59

Disk

V.B. Shikin

B. Fractional Quantum Hall Effect

1. Internal Degrees of Freedom in 0D, ID and 2D Electron Gases 63

in Strong Magnetic Fields

H. AOKI

2. Ground State of a Two-Dimensional Electron Liquid at High 73

Landau Levels

M.M. Fooler, A.A. Koulakov, B.I. Shklovskii

3. Light Scattering by Low-Energy Collective Excitations of 83

Quantum Hall States

A. Pinczuk, B.S. Dennis, A.S. Plaut, L.N. Pfeiffer,K.W. West

IX

4. An Investigation of the Collective Excitations of the Fractional 91

Quantum Hall Effect Using a New Boson Formalism

M. Brownlie, K.A. Benedict

5. A Theory of Phonon Spectroscopy of the Fractional Quantum 95

Hall State

K.A. Benedict

6. Raman Scattering from a Laughlin Liquid at v = 1/3 99

A.J. Turberfield, H.D.M. Davies, J.C. Harris,

R.L. Brockbank, M.J. Snelling, J.F. Ryan

7. Time-Resolved Phonon Absorption of a Two-Dimensional 103

Electron Gas in the Fractional Quantum Hall Regime

U. Zeitler, J.E. Digby, C.J. Mellor, A.J. Kent,

K.A. Benedict, C.T. Foxon, J.J. Harris

8. Experiment-Based Global Phase Diagram for the Quantum 107

Hall Effect

S.V. Kravchenko, W. Mason, J.E. Furneaux,

V.M. Pudalov

9. QHE-Insulator Transition at the Lowest Landau Level in a 111

Two-Dimensional Electron System

V.M. Pudalov

10. The Correlated v = 1 Bi-Layer Fractional Quantum Hall 115

State and Finite Temperature Phase Transition

R.J. Hyndman, T. Ihn, B.L. Gallagher, M. Henini,

T.J. Foster, K.A. Benedict, J.S. Chauhan,

J.R. Middleton, H. Smith

11. Microwave Resonance of 2D Holes in the Wigner Solid 119

RegimeC.-C. Li, L.W. Engel, D. Shahar, D.C. Tsui,

M. Shayegan

12. Rf Absorption Study of the Magnetically-Induced Insulating 123

Phase of a 2DHS

P. Hennigan, C.J. Mellor, M. Henini, A. Beya,

F.I.B. Williams

13. Electron-Hole Chains in Unbalanced Double Layers 127

H. Akera, A.H. MacDonald, D. Yoshioka

14. Dynamics of Compressible Edge and Bosonization 131

J.H. Han, D.J. Thouless

15. Interacting Electrons in High Landau Levels 135

R. Moessner, J.T. Chalker

16. Spin-Reversed Quasiparticles in the Fractional-Quantum- 139

Hall-Effect State

S.I. Doroziikin, M.O. Dorokiiova, R.J. IIaug, K. Ploog

17. Wigner Crystals in Very Strong Magnetic Fields 143

P.A. Maksym

.Breakdown Phenomena

1. Breakdown of the QUE at High Currents 147

S. Kawaji

'2. Theory of the Breakdown of the Quantum Hall Effect 157

V. TSRMEKHMAN, K. TSBMEKHMAN, C. WEXLER,

J.H. Han, D.J. Thoulbss

3. Theoretical Determination of tho Critical Current for the 161

Breakdown of the Quantum Hall Effect

0. CJhauhht, F. Geniet, A. Raymond

4. Explanation of Resistance Jumps Near the Breakdown of the 165

Integer Quantum Hall Effect

J. RiBSS

5. Ouirent Scaling of Conductivity in the Quantum Hall Effect 169

V. Kagalovsky

f>. Nonlocal Breakdown of the Integer Quantum Hall Effect 173

Y. Kawaouciii, K. Komiyama, T. Osada, Y. Siiiraki

7. Breakdown Phenomena of Integer Quantum Hall Effect in 177

Tilted Magnetic Fields

M. Ohno, T. Takamasu, N. Miura, M. Kato, A. Endo,

S. Katkumoto, Y. Iye, T. Tbrashima, II. Aoki, G. Kido

XI

8. Magnetic Field Dependence of the Nonlinear pxx(j)-Beh&- 181viour in the Breakdown of the Quantum-Hall-Effect on the

ir=2-Plateau

H. Scherer, F.-J. Ahlers, L. Bliek

9. Relation Between Critical Electric Field of the Breakdown 185and Magnetic Field in Integer and Fractional Quantum Hall

Effects

T. Takamasu, M. Ohno, N. Miura

10. Temperature Dependence of the "Zero-Resistance" Quantum 189

Hall State Probed by Milli-Kelvin Torque MagnetometryJ. Watts, A. Usher, M. Elliott, W.G. Herrenden-

Harker, T.S. Cheng, C.T. Foxon

D. Edge Effects

1. Dynamic Conductance in Quantum Hall Systems 193

M. Buttiker, T. Christen

2. Quantum Hall Effect: Current Distribution and Existence of 203

Extended States

K. Tsemekhman, V. Tsemekhman, C. Wexler,

D.J. Thouless

3. Inter-Layer Tunneling and Transport Properties in Double- 207

Layer Quantum Hall SystemsD. Yoshioka, A.H. MacDonald

4. Phase Coherence in the Quantum Hall Effect Regime 211

T. Machida, H. Hirai, S. Komiyama, T. Osada,

Y. Shiraki

5. Quantum Hall Resistances with Different Rational Fractions 215

of h/e2 Realized by Controlling the Current Distribution via

Schottky Gates

M. Blocker, G. Nachtwei, F.-J. Ahlers, L. Bliek

6. Bulk Conduction in the Transition Regions Between Hall 219

Plateaus in a Two-Dimensional Electron Gas at High

Magnetic Fields

Q. Du, H. Xu, P. Ramvall, P. Omling

XII

7. Comparison of Nonlocal Resistance Between Si-MOS FET 223

and GaAs/AlGaAs Heterostructure

S. Takaoka, K. Oto, T. Shirae, H. Ishida, K. Murase,K. Morimoto, Y. Hirai

8. Non-Local Transport in PbTe Wide Parabolic Quantum Wells 227

J. Oswald, G. Heigl, G. Span, A. Homer, P. Ganitzer,D.K. Maude, J.C. Portal

II. New Quasi-Particles

A. Composite Fermions

1. Excitations of Composite Fermions 231

J.K. Jain, R.K. Kamilla

2. Composite Fermions in Experiment 243

H.L. Stormer

3. On the Evolution Towards a Fractional Quantum Hall State 255

R.K. Hills, K.A. Benedict

4. Composite Fermion (CF) Energy Gap Variation in Tilted 259

Magnetic Fields

P.J. Gee, J. Singleton, S. Uji, H. Aoki, C.T. Foxon,J.J. Harris

B. Skyrmions

1. Evidence for Skyrmion Excitations in 2D Electrons by Inter- 263

band Optical Transmission SpectroscopyB.B. Goldberg, M.J. Manfra, E.H. Aifer,D.A. Broido, L.N. Pfeiffer, K.W. West

2. Skyrmions in Quantum Hall Ferromagnets 275

A.H. MacDonald

3. Exact Diagonalization Study of Interacting Electrons with 277

Spin Degree of Freedom in the Disk GeometryM. Kasner

XIII

4. Low Temperature Heat Capacity of GaAs Quantum Wells 281

Near u = 1

V. Bayot, E. Grivei, S. Melinte, M.B. Santos,M. Shayegan

5. Theory of Photoluminescence at u = 1 285

N.R. Cooper, D.B. Chklovskii

. Magnetotransport1. Magnetotransport in Combined Magnetic and Electric Super- 289

lattices

R.R. Gerhardts

2. Quantum Transport in Ballistic Quantum Dots 299

D.K. Ferry, R. Akis, D.P. Pivin, K.M. Connolly,J.P. Bird, K. Isiiibashi, Y. Aoyagi, T. Sugano, Y. Ochiai

3. Flux Quantization Effects in Semiconductor-Superconductor 309

Junctions

H. Kroemer, M. Thomas

4. Coulomb Effects on the Magnetoconductance of a Two- 319

Dimensional Electron Gas in a Lateral Superlattice: A

Screened Hartree-Fock Calculation

A. Manolescu, R.R. Gerhardts

5. Consistent Solution of Boltzmann's Equation for Two- 323

Dimensional Electron Systems with Periodic Unidirectional

Modulations of Arbitrary StrengthsR. Menne, R.R. Gerhardts

6. Theory of the Magneto-Transport in a Nonplanar Two- 327

Dimensional Electron Gas

S.M. Badalian, I.S. Ibrahim, F.M. Peeters

7. Electronic Structure of Two-Dimensional Lateral Superstruc- 331

tures in Strong Magnetic Fields

H. Aoki, M. Ando, H. Matsumura

8. Is the Hofstadter Energy Spectrum Observable In Far-Infra- 335

red Absorption?

V. Gudmundsson, R.R. Gerhardts

XIV

9. Fractional Quantum Hall Effect or Hofstadter Butterfly: 339

Interacting Electrons in a Lateral Superlattice Potential

D. Pfannkuche, A.H. MacDonald

10. Transport Properties of Two-Dimensional Electron Gases in 343

Short Period Lateral SuperlatticesM. Hayne, F. Petit, B. Etienne

11. Split-Gate Quantum Wires Having a Ferromagnetic Dot 347

Made by STM Fabrication

T. Kikutani, N. Aoki, A. Oki, C.U. Hong, H. Hori,

S. Yamada

12. Magnetic Field Induced 3D-2D Transition in InGaAs/InP- 351

SuperlatticesO. Jaschinski, J. Schoenes, G. Nachtwei, P. Bonsch,

A. Schlachetzki

13. Influence of Parallel High Magnetic Field on the Ballistic 355

Transport in Two-Dimensional Electron System

K. Oto, S. Takaoka, K. Murase

14. Anti-Crossing of Diamagnetic Energy Levels in Si 5-Doped 359

GaAs

A.F.W. van de Stadt, P.M. Koenraad, J.H. Wolter,

R. Bogaerts, A. de Keyser, F. Herlach

15. Effective Masses and g-Factors of Xz and X^y Electrons in 363

AlAs Quantum Wells

A.F.W. van de Stadt, P.M. Koenraad, J.H. Wolter,

J.A.A.J. Perenboom

16. Ring Exchange Interaction Among Strongly Localized Elec- 367

Irons in Si MOSFETs

T. Okamoto, S. Kawaji

17. Phonon Emission From 2DEG: Evidence of Transition to the 371

Hydrodynamic Regime

E. Chow, H.P. Wei, S.M. Girvin, M. Shayegan

18. Magneto-Photon-Phonon Resonances in Terahertz-Driven 375

2DEGs in High Magnetic Fields

W. Xu, C. Zhang

XV

19. The Phonon-Induced Drag of 2D Holes in Magnetic Fields 379D. Lehmann, A.J. Kent, R.E. Strickland, K.R. Strick¬

land, M. Henini, C. Jasiukibwicz, T. Paszkiewicz

20. Modification of the 2D Electronic Properties in Si-6-Doped 383

InSb Due to Surface Effects

A. de Keyser, R. Bogaerts, L. van Bockstal,F. Herlach, V.C. Karavolas, F.M. Peeters,W. VAN DE GRAAF, G. BORGHS

21. Application of Magneto-Capacitance to the Study of Narrow 387

Gap Semiconductors

J. Chu, K. Liu, D.Y. Tang

22. Large Negative Magnetoresistance in the Insulating Regime 391

of a Two-Dimensional Electron Gas with an Artificial Potential

G.M. Gusev, X. Kleber, U. Gennser, D.K. Maude,

J.C. Portal, D.I. Lubyshev, P. Basmaji,

M.P.A. da Silva, J.C. Rossi, Y.U.V. Nastaushev

23. Magnetoresistance of FeSi in the Region of Variable-Range 395

Hopping

J. Broto, E.K. Arushanov, H. Rakoto, M. Respaud,

J. Leotin, E. Bucher, Ch. Kloc, K.G. Lisunov

24. Influence of the Magnetic Properties of Mn on Shubnikov-de 399

Haas (SdH)-Oscillations and Quantum Hall Effect (QHE) in

Cd(MnMg)Te/Cd(Mn)Te Quantum Wells

J. Gerschutz, S. Scholl, G. Landwehr

25. High Magnetic Field Study of Metal-Insulator Transition in 403

Perovskite Type Manganese Oxide Ri_xCa!EMn03 (R=Pr, Nd)

M. Tokunaga, N. Miura, Y. Tomioka, Y. Tokura

26. Nonparabolicity and Anisotropy of Cyclotron Masses in 407

Highly Doped n-Germanium

D, Schneider, U. Strauss

27. Subband Locking as the Precursor to Hybrid Double-Single- 411

Layer Behaviour in a Double Quantum Well Structure

A.G. Davies, C.H.W. Barnes, K.R. Zolleis,

J.T. Nicholls, M.Y. Simmons, D.A. Ritchie

28. GaAs-Single Quantum Wells with Extremely High Conducti- 415

vities

K.-J. Friedland, R. Hey, H. Kostial, K. Ploog

29. Effect of the Uniaxial Stress on the Quantum Transport of 419

Two-Dimensional Holes in the Si-MOSFETs

S.I. Dorozhkin, V.E. Bisti, G. Landwehr

Tunneling

1. Magnetotunnelling Spectroscopy of Quantum Dots Formed 423

by Self-Organized Expitaxial Growth

L. Eaves, I.E. Itskevich, T. Ihn, A. Thornton,P.H. Beton, P.C. Main, T.J. Foster, M. Henini

2. Precursors and Transition to Chaos in Resonant Tunneling 433

G. Boebinger

3. Universal Conductance Fluctuations and Telegraph Noise 435

Spectroscopy to Investigate the Magnetisation of Self-

Organised ErAs Quantum Dots

F. Coppinger, J. Gbnoe, L.B. Rigal, D.K. Maude,

U. Gennser, J.C. Portal, K.E. Singer, P. Rutter,

T. Taskin, A.C. Wright, A.R. Peaker

4. Tunnelling Between Parallel 2DEGs with an In-Plane Magne- 445

tic Field in the "Quantum Transport Regime"M.J. Gompertz, T. Ihn, H.A. Carmona, A. Nogaret,

P.C. Main, L. Eaves, M. Henini, S.P. Beaumont

5. Current-Voltage Characteristics of Quantum Chaotic Tunnel 449

Structures in High Magnetic Fields

P.B. Wilkinson, T.M. Fromhold, F.W. Sheard

6. Magnetic Field Studies of Phonon Assisted Tunnelling in a 453

5-Doped Double Barrier Resonant Tunnelling Device

E.S. Moskalenko, D.N. Hill, F.F. Ouali, L.J. Challis,

F.W. Sheard, M. Henini

XVII

7. Inter-Landau Level Transitions at the Threshold of Resonant 457

Tunneling in a Magnetic Field

S.A. Brown, L.D. Macks, P.E. Simmonds, T.A. Fisher,M. Emeny

8. Magnetoresistance and Zero-Bias Anomaly in Tunnel Schott- 461

ky-Barrier Junctions at Quantizing Magnetic Fields

A.Ya. Shul'man, I.N. Kotel'nikov

9. Quantum-Interference Oscillations of the Resonant-Tunnel- 465

ling Current in a Transverse Magnetic Field

T. Wosinski, T. Figiblski, A. Makosa, W. Dobrowolski,

S.A. Vitusevich, A.E. Belyaev

10. Dynamics of Electric Field Domain in GalnAs/AlInAs p-n 469

Multiple Quantum Wells Under High Magnetic Field

S. Yamada, Y. Kawai, K. Yamamoto, H. Asai,

Y. Kawamura, T. Sasaki, T. Fukase

11. Single Electron Tunnelling through Self-Assembled InAs 473

Quantum Dots as Spectroscopic Probe of a 2DEG

A. Thornton, T. Ihn, I.E. Itskevich, P.C. Main,

L. Eaves, M. Henini

12. Magneto-Tunneling Study of Zero-Dimensional Electronic 477

States in Self-Organized InAs Quantum Dot

M. Narihiro, G. Yusa, Y. Nakamura, T. Noda,

H. Sakaki

13. Magnetotunneling Study of a Trapezoidal Si Quantum Well 481

J. Lindolf, U. Kunze, W. Kiunke, I. Eisele

14. Resonant Tunneling in ZnSe/BeTe-Structures in High Mag- 485

netic Fields

M. Keim, U. Lunz, G. Reuscher, A. Waag, G. Landwehr

15. Resonance Broadening of Two-Dimensional States in Semi- 489

conductors with Inverted Band Structures

A.V. Germanenko, G.M. Minkov, V.A. Larionova,

O.E. Rut

xviii

16. Spin-Dependent Tunneling in Metal-Insulator-Narrow Gap 493

Semiconductor Structures in a Magnetic Field

G.M. Minkov, O.E. Rut, A.V. Germanenko,

V.A. Larionova

V. Small Quantum Systems

1. Influence of s-d Exchange Interaction on Universal Conduc- 497

tance Fluctuations

J. Jaroszynski, T. Dietl

2. Magnetisation and Persistent Currents in Two-Dimensional 507

Rings

W.-C. Tan, J.C. Inkson

3. Boundary Element Method for Calculating Electronic States 511

of Quantum Dot Structures in Magnetic Fields

P.A. Knipp, T.L. Reinecke

4. Study of Phase Breaking of Mesoscopic Transport in Quan- 515

turn Wire and Dot

Y. Ochiai, Y. Ohkubo, A.W. Widjaja, K. Yamamoto,J.P. Bird, K. Ishibashi, Y. Aoyagi, T. Sugano,D.K. Ferry

5. Magnetotransport Properties of a New-Type Star-Like Sinai 519

Billiard

M.V. Budantsev, Z.D. Kvon, A.G. Pogosov,

A.I. Toropov, N.T. Moshegov, A.E. Plotnikov

6. The Asymmetry of Mesoscopic Photovoltaic Effect in Magne- 523

tic Field in Ballistic and Adiabatic Transport RegimesA.A. Bykov, L.V. Litvin, E.B. Olshanetskii,

N.T. Moshegov, A.I. Toropov