Magnetic field asymmetry of transport dynamics in a Coulomb-coupled quantum point contact

被引：1

作者：

He, Jianhong ^{[1
]}

Guo, Huazhong ^{[1
]}

Yue, Xiaokai ^{[1
]}

Gao, Jie ^{[1
,2
]}

机构：

[1] Sichuan Univ, Coll Phys, Chengdu 610064, Peoples R China

[2] Natl Inst Measurement & Testing Technol, Chengdu 610021, Peoples R China

来源：

PHYSICAL REVIEW B | 2021年 / 103卷 / 24期

基金：

中国国家自然科学基金;

关键词：

LOW-FREQUENCY ADMITTANCE; CONDUCTANCE; CAPACITANCE; LOCALIZATION; ELECTRONS;

D O I：

10.1103/PhysRevB.103.245309

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report phase-resolved microwave magnetotransport measurements of a Coulomb-coupled quantum point contact in the edge state regime. We show that the inductive admittance is manifestly asymmetric under reversal of magnetic field, whereas the field-symmetric conductance is observed. Furthermore, the asymmetry is found to exhibit pronounced fluctuations as a function of magnetic field and transmission. This constitutes direct evidence that kinetic effects associated with the nonequilibrium polarization charge contribute to dynamical magnetoasymmetry in phase-coherent mesoscopic conductors. In addition, we find a striking magnetoasymmetry in the electronic transit time, providing important information about Coulomb coupling effects on quantum dynamics of electrons.

引用

页数：8

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