EXPERIMENTS ON INELASTIC-SCATTERING IN THE INTEGER QUANTUM HALL-EFFECT

被引:14
作者
CHOW, E
WEI, HP
机构
[1] Department of Physics, Swain Hall West, Indiana University, Bloomington
来源
PHYSICAL REVIEW B | 1995年 / 52卷 / 19期
关键词
D O I
10.1103/PhysRevB.52.13749
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Using the temperature (T) dependence of the maximum slope of rho(xy) versus B in between two adjacent integer quantum Hall (IQH) plateaus as a thermometer for T<1.2 K, we study the effective temperature (T-e) of a two-dimensional electron gas as a function of applied current I in five GaAs/AlxGa1-xAs heterostructures with mobility ranging from 52 000 to 780 000 cm(2)/V s. We find that there is a characteristic current above which T-e similar to I-a and a=0.49+/-0.03 independent of Landau levels and electron mobilities. In the context of electron heating, our result demonstrates explicitly the existence of a universal T exponent p=2.1+/-0.24 for the inelastic scattering length in the IQH regime.
引用
收藏
页码:13749 / 13752
页数:4
相关论文
共 36 条
[1]   SCALING THEORY OF LOCALIZATION - ABSENCE OF QUANTUM DIFFUSION IN 2 DIMENSIONS [J].
ABRAHAMS, E ;
ANDERSON, PW ;
LICCIARDELLO, DC ;
RAMAKRISHNAN, TV .
PHYSICAL REVIEW LETTERS, 1979, 42 (10) :673-676
[2]   EFFECT OF SCREENING OF THE COULOMB INTERACTION ON THE CONDUCTIVITY IN THE QUANTUM HALL REGIME [J].
ALEINER, IL ;
SHKLOVSKII, BI .
PHYSICAL REVIEW B, 1994, 49 (19) :13721-13727
[3]   POSSIBLE EXPLANATION OF NON-LINEAR CONDUCTIVITY IN THIN-FILM METAL WIRES [J].
ANDERSON, PW ;
ABRAHAMS, E ;
RAMAKRISHNAN, TV .
PHYSICAL REVIEW LETTERS, 1979, 43 (10) :718-720
[4]   A FUNDAMENTAL NOISE LIMIT FOR BIASED RESISTORS AT LOW-TEMPERATURES [J].
ARAI, MR .
APPLIED PHYSICS LETTERS, 1983, 42 (10) :906-908
[5]   HOT-ELECTRON ENERGY RELAXATION VIA ACOUSTIC PHONON EMISSION IN INP/IN0.53GA0.47AS HETEROSTRUCTURES AND SINGLE QUANTUM WELLS [J].
BARLOW, MJ ;
RIDLEY, BK ;
KANE, MJ ;
BASS, SJ .
SOLID-STATE ELECTRONICS, 1988, 31 (3-4) :501-505
[6]  
BISHOP DJ, 1980, PHYS REV LETT, V44, P1153, DOI 10.1103/PhysRevLett.44.1153
[7]   MULTIFRACTAL WAVE-FUNCTIONS AND INELASTIC-SCATTERING IN THE INTEGER QUANTUM HALL-EFFECT [J].
BRANDES, T ;
SCHWEITZER, L ;
KRAMER, B .
PHYSICAL REVIEW LETTERS, 1994, 72 (22) :3582-3585
[8]   NON-METALLIC CONDUCTION IN THIN METAL-FILMS AT LOW-TEMPERATURES [J].
DOLAN, GJ ;
OSHEROFF, DD .
PHYSICAL REVIEW LETTERS, 1979, 43 (10) :721-724
[9]  
Dongzi Liu, 1993, Modern Physics Letters B, V7, P449, DOI 10.1142/S0217984993000448
[10]   MICROWAVE FREQUENCY-DEPENDENCE OF INTEGER QUANTUM HALL-EFFECT - EVIDENCE FOR FINITE-FREQUENCY SCALING [J].
ENGEL, LW ;
SHAHAR, D ;
KURDAK, C ;
TSUI, DC .
PHYSICAL REVIEW LETTERS, 1993, 71 (16) :2638-2641