Spin-dependent shot noise in diluted magnetic semiconductor/semiconductor heterostructures with a nonmagnetic barrier

WU Shuang; GUO Yong

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Spin-dependent shot noise in diluted magnetic semiconductor/semiconductor heterostructures with a nonmagnetic barrier

WU Shuang 1,GUO Yong 2

1.Department of Physics and State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084, People\'s Republic of China

2.Department of Physics and State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084, People's Republic of China

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Funding: This work was supported by the NSFC （No.11174168）, the SRFDP （No.20100002110079）, and the National Basic Research Program of China （No.2011CB606405）

Opened online:24 December 2013

Accepted by: none

Citation: WU Shuang,GUO Yong.Spin-dependent shot noise in diluted magnetic semiconductor/semiconductor heterostructures with a nonmagnetic barrier[OL]. [24 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4575893

We investigate quantum size effect on the spin-dependent shot noise in the diluted magnetic semiconductor(DMS)/semiconductor heterostructure with a nonmagnetic semiconductor (NMS) barrier in the presence of external magnetic and electric fields. The results demonstrate that the NMS barrier plays a quite different role from the DMS layer in the electron transport process. It is found that spin-down shot noise shows relatively regular oscillations as the width of DMS layer increases, while the spin-up shot noise deceases monotonically. However, as the width of NMS layer increases, the spin-down shot noise displays irregular oscillations at first and then decreases while the spin-up shot noise decreases at a quite different rate. The results indicate that the shot noise can be used as a sensitive probe in detecting material type and its size.

Keywords:condensed matter physics; spin; shot noise; diluted magnetic semiconductor; heterostructure

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