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CONDUCTANCE FLUCTUATIONS AND CHAOTIC SCATTERING IN BALLISTIC MICROSTRUCTURES

被引：576
作者：
MARCUS, CM
RIMBERG, AJ
WESTERVELT, RM
HOPKINS, PF
GOSSARD, AC
机构：
[1] HARVARD UNIV,DEPT PHYS,CAMBRIDGE,MA 02138
[2] UNIV CALIF SANTA BARBARA,DEPT MAT,SANTA BARBARA,CA 93106
来源：
PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 03期
关键词：
D O I：
10.1103/PhysRevLett.69.506
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report detailed measurements of the low-temperature magnetoconductance in ballistic microstructures in the shape of a "chaotic" stadium and a circle with quantum-point-contact leads. Both structures show large, aperiodic, conductance fluctuations as a function of perpendicular magnetic field, and a zero-field resistance peak indicating geometry-dependent enhanced backscattering. Power spectra of fluctuations are consistent with recent semiclassical analyses based on quantum chaotic scattering, with the circle showing enhanced high-frequency spectral content.
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页码：506 / 509
页数：4
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