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
影响因子:
4.6
通讯作者:
Wegscheider, W.
中科院分区:
文献类型:
--
作者:
Mani, R. G.;Kriisa, A.;Wegscheider, W.
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.
登录
查看更多内容
影响因子:
1.7
作者:
FUKUYAMA, H
通讯作者:
FUKUYAMA, H
影响因子:
8.6
作者:
Li, L;Proskuryakov, YY;Ritchie, DA
通讯作者:
Ritchie, DA
影响因子:
3.7
作者:
MANI, RG;VONKLITZING, K;PLOOG, K
通讯作者:
PLOOG, K
影响因子:
8.6
作者:
PAALANEN, MA;TSUI, DC;HWANG, JCM
通讯作者:
HWANG, JCM
影响因子:
3.7
作者:
Zala, G;Narozhny, BN;Aleiner, IL
通讯作者:
Aleiner, IL