中国物理B ›› 2007, Vol. 16 ›› Issue (5): 1440-1444.doi: 10.1088/1009-1963/16/5/045
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
张磊, 邓宁, 任敏, 董浩, 陈培毅
Zhang Lei(张磊)† , Deng Ning(邓宁), Ren Min(任敏), Dong Hao(董浩), and Chen Pei-Yi(陈培毅)
摘要: 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.
中图分类号: (Spin polarized transport in semiconductors)