Size-dependent giant-magnetoresistance in millimeter scale GaAs/AlGaAs 2D electron devices.

Size-dependent giant-magnetoresistance in millimeter scale GaAs/AlGaAs 2D electron devices.
复制标题

DOI:
10.1038/srep02747
复制
发表时间:
2013-09-25
期刊:
影响因子:
4.6
通讯作者:
Wegscheider, W.
Wegscheider, W.
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Mani, R. G.;Kriisa, A.;Wegscheider, W.

文献摘要

参考文献

被引文献

相似文献

施加小磁场引起的电阻的大变化可能对设备应用有用。这种巨磁阻(GMR)效应也为相关电子传输中涉及的物理现象提供了新的见解。这项研究研究了由高迁移率 GaAs/AlGaAs 二维电子系统 (2DES) 制造的毫米宽器件中的“钟形”负 GMR,其大小随着温度的降低而增大。实验表明,磁场轴上磁阻的跨度随着器件宽度 W 的减小而增加,而没有同时进行霍尔电阻 Rxy 校正。多传导模型,包括负对角线电导率和非零非对角线电导率,再现了实验观察结果。结果表明,具有毫米级电子平均自由程的毫米宽 2DES 中的尺寸效应是造成观察到的“非欧姆”尺寸依赖性负 GMR 的原因。
Large changes in the electrical resistance induced by the application of a small magnetic field are potentially useful for device-applications. Such Giant Magneto-Resistance (GMR) effects also provide new insights into the physical phenomena involved in the associated electronic transport. This study examines a “bell-shape” negative GMR that grows in magnitude with decreasing temperatures in mm-wide devices fabricated from the high-mobility GaAs/AlGaAs 2-Dimensional Electron System (2DES). Experiments show that the span of this magnetoresistance on the magnetic-field-axis increases with decreasing device width, W, while there is no concurrent Hall resistance, Rxy, correction. A multi-conduction model, including negative diagonal-conductivity, and non-vanishing off-diagonal conductivity, reproduces experimental observations. The results suggest that a size effect in the mm-wide 2DES with mm-scale electron mean-free-paths is responsible for the observed “non-ohmic” size-dependent negative GMR.
DOI: 10.1143/jpsj.49.644
发表时间: 1980-01-01
影响因子: 1.7
作者:
FUKUYAMA, H
通讯作者: FUKUYAMA, H
DOI: 10.1103/physrevlett.90.076802
发表时间: 2003-02-21
影响因子: 8.6
作者:
Li, L;Proskuryakov, YY;Ritchie, DA
通讯作者: Ritchie, DA
DOI: 10.1103/physrevb.48.4571
发表时间: 1993-08-15
期刊: PHYSICAL REVIEW B
影响因子: 3.7
作者:
MANI, RG;VONKLITZING, K;PLOOG, K
通讯作者: PLOOG, K
DOI: 10.1103/physrevlett.51.2226
发表时间: 1983-01-01
影响因子: 8.6
作者:
PAALANEN, MA;TSUI, DC;HWANG, JCM
通讯作者: HWANG, JCM
DOI: 10.1103/physrevb.64.201201
发表时间: 2001-11-15
期刊: PHYSICAL REVIEW B
影响因子: 3.7
作者:
Zala, G;Narozhny, BN;Aleiner, IL
通讯作者: Aleiner, IL