Resistance fluctuations in narrow AlGaAs/GaAs heterostructures: Direct evidence of fractional charge in the fractional quantum hall effect.
作者： J. A. Simmons , H. P. Wei , L. W. Engel , D. C. Tsui , M. Shayegan
DOI: 10.1103/PHYSREVLETT.63.1731
关键词:
摘要: In \ensuremath{\sim}2-\ensuremath{\mu}m-wide Hall bars of high-mobility GaAs/AlGaAs heterostructure resistance fluctuations quasiperiod \ensuremath{\Delta}B\ensuremath{\simeq}0.016 T are observed near the diagonal minima for Landau-level filling factors \ensuremath{\nu}=1,2,3,4. This behavior is consistent with resonant reflection through magnetically bound states as a mechanism breakdown dissipationless transport in narrow channels. \ensuremath{\nu}=(1/3 minimum fractional quantum effect we observe similar fluctuation structure, but period \ensuremath{\sim}0.05 T\ensuremath{\simeq}3\ensuremath{\Delta}B, indicative by quasiparticles charge e/3.
harvard.edu
princeton.edu
sci-hub.se 参考文章(22)
D. C. Tsui, H. L. Stormer, A. C. Gossard, Two-Dimensional Magnetotransport in the Extreme Quantum Limit Physical Review Letters. ,vol. 48, pp. 1559- 1562 ,(1982) , 10.1103/PHYSREVLETT.48.1559
R. Willett, J. P. Eisenstein, H. L. Störmer, D. C. Tsui, A. C. Gossard, J. H. English, Observation of an even-denominator quantum number in the fractional quantum Hall effect Physical Review Letters. ,vol. 59, pp. 1776- 1779 ,(1987) , 10.1103/PHYSREVLETT.59.1776
K. v. Klitzing, G. Dorda, M. Pepper, New Method for High-Accuracy Determination of the Fine-Structure Constant Based on Quantized Hall Resistance Physical Review Letters. ,vol. 45, pp. 494- 497 ,(1980) , 10.1103/PHYSREVLETT.45.494
R. B. Laughlin, Anomalous Quantum Hall Effect: An Incompressible Quantum Fluid with Fractionally Charged Excitations Physical Review Letters. ,vol. 50, pp. 1395- 1398 ,(1983) , 10.1103/PHYSREVLETT.50.1395
R. G. Clark, J. R. Mallett, S. R. Haynes, J. J. Harris, C. T. Foxon, Experimental determination of fractional charge e/q for quasiparticle excitations in the fractional quantum Hall effect Physical Review Letters. ,vol. 60, pp. 1747- 1750 ,(1988) , 10.1103/PHYSREVLETT.60.1747
P. A. Lee, A. Douglas Stone, H. Fukuyama, Universal conductance fluctuations in metals: Effects of finite temperature, interactions, and magnetic field. Physical Review B. ,vol. 35, pp. 1039- 1070 ,(1987) , 10.1103/PHYSREVB.35.1039
A.M. Chang, G. Timp, T.Y. Chang, J.E. Cunningham, P.M. Mankiewich, R.E. Behringer, R.E. Howard, Deviation of the quantum hall effect from exact quantization in narrow GaAs-AlxGa1−xAs heterostructure devices Solid State Communications. ,vol. 67, pp. 769- 772 ,(1988) , 10.1016/0038-1098(88)90021-X
G. Timp, A. M. Chang, P. Mankiewich, R. Behringer, J. E. Cunningham, T. Y. Chang, R. E. Howard, Quantum transport in an electron-wave guide. Physical Review Letters. ,vol. 59, pp. 732- 735 ,(1987) , 10.1103/PHYSREVLETT.59.732
G. Timp, P. M. Mankiewich, P. deVegvar, R. Behringer, J. E. Cunningham, R. E. Howard, H. U. Baranger, J. K. Jain, Suppression of the Aharonov-Bohm effect in the quantized Hall regime Physical Review B. ,vol. 39, pp. 6227- 6230 ,(1989) , 10.1103/PHYSREVB.39.6227
S. Washburn, A. B. Fowler, H. Schmid, D. Kern, Quantized Hall Effect in the Presence of Backscattering Physical Review Letters. ,vol. 61, pp. 2801- 2804 ,(1988) , 10.1103/PHYSREVLETT.61.2801