DISORDER AND THE FRACTIONAL QUANTUM HALL-EFFECT - THE REDUCTION OF THE GAP

被引：2
作者：
MIELKE, A
机构：
[1] Inst. de Phys. Theor., Ecole Polytech. Federale de Lausanne
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 1990年 / 2卷 / 48期
关键词：
D O I：
10.1088/0953-8984/2/48/010
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The author presents numerical as well as analytical results for the reduction of the energy gap in the fractional quantum Hall regime due to disorder. The disordered substrate is treated perturbatively. It consists of randomly distributed long-range scatterers. It turns out that the reduction of the energy gap is determined by the mean value of the fluctuations of the potential alone and that it is proportional to the fractional charge of the quasiparticles.
引用
收藏
页码：9567 / 9576
页数：10
相关论文
共 24 条
[1]   ELECTRONIC-PROPERTIES OF TWO-DIMENSIONAL SYSTEMS [J].
ANDO, T ;
FOWLER, AB ;
STERN, F .
REVIEWS OF MODERN PHYSICS, 1982, 54 (02) :437-672
[2]   MAGNETIC-FIELD DEPENDENCE OF ACTIVATION-ENERGIES IN THE FRACTIONAL QUANTUM HALL-EFFECT [J].
BOEBINGER, GS ;
CHANG, AM ;
STORMER, HL ;
TSUI, DC .
PHYSICAL REVIEW LETTERS, 1985, 55 (15) :1606-1609
[3]   ACTIVATION-ENERGIES AND LOCALIZATION IN THE FRACTIONAL QUANTUM HALL-EFFECT [J].
BOEBINGER, GS ;
STORMER, HL ;
TSUI, DC ;
CHANG, AM ;
HWANG, JCM ;
CHO, AY ;
TU, CW .
PHYSICAL REVIEW B, 1987, 36 (15) :7919-7929
[4]  
Chakraborty T., 1988, FRACTIONAL QUANTUM H
[5]   MAGNETO-ROTON THEORY OF COLLECTIVE EXCITATIONS IN THE FRACTIONAL QUANTUM HALL-EFFECT [J].
GIRVIN, SM ;
MACDONALD, AH ;
PLATZMAN, PM .
PHYSICAL REVIEW B, 1986, 33 (04) :2481-2494
[6]   ANOMALOUS QUANTUM HALL-EFFECT AND TWO-DIMENSIONAL CLASSICAL PLASMAS - ANALYTIC APPROXIMATIONS FOR CORRELATION-FUNCTIONS AND GROUND-STATE ENERGIES [J].
GIRVIN, SM .
PHYSICAL REVIEW B, 1984, 30 (02) :558-560
[7]   EXCITATION-ENERGIES OF THE FRACTIONAL QUANTIZED HALL-EFFECT IN HIGH-MOBILITY ALXGA1-XAS GAAS HETEROSTRUCTURES [J].
GOLD, A .
PHYSICAL REVIEW B, 1989, 40 (05) :3375-3378
[8]   DISORDER EFFECTS ON THE TRANSPORT-PROPERTIES IN THE FRACTIONAL QUANTIZED HALL REGIME [J].
GOLD, A .
EUROPHYSICS LETTERS, 1986, 1 (05) :241-247
[9]   EXCITATION GAP IN THE FRACTIONALLY QUANTIZED HALL-EFFECT [J].
GOLD, A .
PHYSICAL REVIEW B, 1987, 36 (06) :3268-3279
[10]   SCATTERING TIME AND SINGLE-PARTICLE RELAXATION-TIME IN A DISORDERED TWO-DIMENSIONAL ELECTRON-GAS [J].
GOLD, A .
PHYSICAL REVIEW B, 1988, 38 (15) :10798-10811
123