THERMAL COLLAPSE OF THE FRACTIONAL QUANTUM-HALL-EFFECT ENERGY GAPS

被引:23
作者
KUKUSHKIN, IV
PULSFORD, NJ
VONKLITZING, K
HAUG, RJ
PLOOG, K
BUHMANN, H
POTEMSKI, M
MARTINEZ, G
TIMOFEEV, VB
机构
[1] MAX PLANCK INST FESTKORPERFORSCH,W-7000 STUTTGART 80,GERMANY
[2] CNRS,MAX PLANCK INST FESTKORPERFORSCH,GRENOBLE HIGH MAGNET FIELD LAB,F-38042 GRENOBLE 9,FRANCE
来源
EUROPHYSICS LETTERS | 1993年 / 22卷 / 04期
关键词
ELECTRON STATES IN LOW-DIMENSIONAL STRUCTURES (INC QUANTUM WELLS; SUPERLATTICES; LAYER STRUCTURES AND INTERCALATION COMPOUNDS); SEMICONDUCTOR-TO-SEMICONDUCTOR CONTACTS; P-N JUNCTIONS; AND HETEROJUNCTIONS; MAGNETOOPTICAL EFFECTS;
D O I
10.1209/0295-5075/22/4/008
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The relationship between the mean energy of a two-dimensional electron gas and the first moment of their radiative recombination is investigated in the regimes of the integer and fractional quantum Hall effects. It is shown that the magnetic-field dependence of the first moment provides a method to measure the cyclotron, enhanced spin and quasi-particle energy gaps at the same time. This allows for a comparative analysis of the temperature dependence of these gaps. Upon increasing temperature an abrupt thermal collapse is observed for those energy gaps which are associated with electron-electron interactions.
引用
收藏
页码:287 / 292
页数:6
相关论文
共 23 条
[1]   THEORY OF OSCILLATORY G-FACTOR IN AN MOS INVERSION LAYER UNDER STRONG MAGNETIC-FIELDS [J].
ANDO, T ;
UEMURA, Y .
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1974, 37 (04) :1044-1052
[2]  
APALKOV VM, 1991, JETP LETT+, V53, P442
[3]   MAGNETOOPTICAL EVIDENCE FOR FRACTIONAL QUANTUM HALL STATES DOWN TO FILLING FACTOR 1/9 [J].
BUHMANN, H ;
JOSS, W ;
VONKLITZING, K ;
KUKUSHKIN, IV ;
MARTINEZ, G ;
PLAUT, AS ;
PLOOG, K ;
TIMOFEEV, VB .
PHYSICAL REVIEW LETTERS, 1990, 65 (08) :1056-1059
[4]   SUPPRESSION OF GROUND-STATE OPTICAL RECOMBINATION IN THE QUANTUM HALL REGIME [J].
DAHL, M ;
HEIMAN, D ;
PINCZUK, A ;
GOLDBERG, BB ;
PFEIFFER, LN ;
WEST, KW .
PHYSICAL REVIEW B, 1992, 45 (12) :6957-6960
[5]  
DITE AF, 1991, JETP LETT+, V54, P389
[6]   COLLECTIVE-EXCITATION GAP IN THE FRACTIONAL QUANTUM HALL-EFFECT [J].
GIRVIN, SM ;
MACDONALD, AH ;
PLATZMAN, PM .
PHYSICAL REVIEW LETTERS, 1985, 54 (06) :581-583
[7]   OPTICAL INVESTIGATIONS OF THE INTEGER AND FRACTIONAL QUANTUM HALL-EFFECTS - ENERGY PLATEAUS, INTENSITY MINIMA, AND LINE SPLITTING IN BAND-GAP EMISSION [J].
GOLDBERG, BB ;
HEIMAN, D ;
PINCZUK, A ;
PFEIFFER, L ;
WEST, K .
PHYSICAL REVIEW LETTERS, 1990, 65 (05) :641-644
[8]   EXCITATIONS FROM A FILLED LANDAU-LEVEL IN THE TWO-DIMENSIONAL ELECTRON-GAS [J].
KALLIN, C ;
HALPERIN, BI .
PHYSICAL REVIEW B, 1984, 30 (10) :5655-5668
[9]  
KIKUSHKIN IV, 1986, JETP LETT+, V44, P228
[10]   REDUCTION OF THE ELECTRON-DENSITY IN GAAS-ALXGA1-XAS SINGLE HETEROJUNCTIONS BY CONTINUOUS PHOTOEXCITATION [J].
KUKUSHKIN, IV ;
VONKLITZING, K ;
PLOOG, K ;
KIRPICHEV, VE ;
SHEPEL, BN .
PHYSICAL REVIEW B, 1989, 40 (06) :4179-4182