河北师范大学学报—

期刊信息

刊名：河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
主办：河北师范大学
ISSN： 1000-5854
CN： 13-1061/N
中国科技核心期刊
中国期刊方阵入选期刊
中国高校优秀科技期刊
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河北省优秀科技期刊

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电场、磁场对二维无序系统电子输运的影响

刘龙¹

孙素涛²

白志明¹

1. 河北科技大学理学院, 河北石家庄 050018;
2. 石家庄科技信息职业学院机电及汽车工程学院, 河北石家庄 050000
DOI： 10.13763/j.cnki.jhebnu.nse.2017.02.007

Influence of Electric Field and Magnetic Field on Transport Properties of Two-dimensional Disordered Electron System

LIU Long¹, SUN Sutao², BAI Zhiming¹

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摘要/Abstract

摘要：

研究了电场、磁场作用下，二维无序杂质系统电导的物理性质.电场的作用削弱了系统电导的"台阶"量子效应，随着中间散射区域尺寸的增大，系统电导随电子能量的变化震荡加剧；系统电导随着磁场的变化表现出周期性震荡行为，其震荡的剧烈程度随外部电压的增大而变小；受杂质散射的影响，系统电导随无序杂质质量浓度的增大而减小.

Abstract：

On the action of electric field and magnetic field, the phenomenon of quantized conductance in a two-dimensional system with disordered impurities is investigated.The electric field decreases the conductance and reduced its "step" quantum effect.The increase of the size of the intermediate scattering area intensifies the oscillation of the conductance varying with the electron energy.The conductance exhibits periodic oscillation with the external magnetic field, and the intensity of the oscillation becomes smaller with the increase of the electric field. With the increase of the impurity concentration, the conductance decreases.

关键词

关键词： 紧束缚近似 ; 格林函数 ; 电场 ; 无序杂质

Key words： tight binding approximation ; Green's function ; electric field ; disordered impurity

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