Abstract Effective spin-polarized injection from magnetic semiconductor (MS) to nonmagnetic semiconductor (NMS) has been highlighted in recent years. In this paper we study theoretically the dependence of nonequilibrium spin polarization (NESP) in NMS during spin-polarized injection through the magnetic p-n junction. Based on the theory in semiconductor physics, a model is established and the boundary conditions are determined in the case of no external spin-polarized injection and low bias. The control parameters that may influence the NESP in NMS are indicated by calculating the distribution of spin polarization. They are the doping concentrations, the equilibrium spin polarization in MS and the bias. The effective spin-polarized injection can be realized more easily by optimizing the above parameters.
Received: 24 September 2006
Revised: 14 December 2006
Accepted manuscript online:
Fund: Project supported by the National Natural Science
Foundation of China (Grant No 60606021), the Specialized Research Fund for
the Doctoral Program of Higher Education of China (Grant No~20060003067)
and the Key Fundamental Research Foundation of Tsinghua U
Cite this article:
Zhang Lei(张磊), Deng Ning(邓宁), Ren Min(任敏), Dong Hao(董浩), and Chen Pei-Yi(陈培毅) Dependences of spin polarization on the control parameters in the spin-polarized injection through the magnetic p-n junction 2007 Chinese Physics 16 1440
Enhanced absorption process in the thin active region of GaAs based p-i-n structure Chen Yue(岳琛), Xian-Sheng Tang(唐先胜), Yang-Feng Li(李阳锋), Wen-Qi Wang(王文奇), Xin-Xin Li(李欣欣), Jun-Yang Zhang(张珺玚), Zhen Deng(邓震), Chun-Hua Du(杜春花), Hai-Qiang Jia(贾海强), Wen-Xin Wang(王文新), Wei Lu(陆卫), Yang Jiang(江洋), and Hong Chen(陈弘). Chin. Phys. B, 2021, 30(9): 097803.
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