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Two-dimensional spin-orbit coupling in electronic systems magnetoelectric effect and spin Hall effect

Author: HuangZhiAn
Tutor: HuLiangBin
School: South China Normal University
Course: Condensed Matter Physics
Keywords: Spintronics Spin - orbit coupling Spin Hall Effect Kinetic magnetoelectric effect
CLC: O472
Type: Master's thesis
Year: 2007
Downloads: 191
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Abstract


Semiconductor field-induced nonequilibrium spin polarization ( or spin current ) is the field of spintronics, a very important research focus. Theoretical studies show that there are two different physical mechanisms can lead to the semiconductor field-induced non- equilibrium spin ( or swirl flow ) the generation of the so-called spin Hall effect (Spin Hall Effect) and dynamic magnetic electric effect (Kinetic Magneto-Electric Effect). Both of these effects are derived from the electron spin - orbit coupling interaction , the electronic orbital and spin freedom freedom association between the two effects , but have very different physical mechanisms . These two effects are involved in some of the basic theoretical problems of spintronics is a very important research topic. The master's degree thesis studied theoretically in with Rashba-Dresselhaus spin - orbit interaction is two-dimensional electronic systems and foreign semiconductor field-induced kinetic magnetoelectric effect and spin Hall effect and the basic physical characteristics. The main contents are my master's degree under the guidance of instructors made ??during research work summary. Thesis consists of three chapters , the specific content is organized as follows : The first chapter briefly introduces the research background , focusing on the current spintronics some of the research hotspots and related research . Chapter II study with Rashba-Dresselhaus spin in - orbit interaction is two-dimensional electron system dynamics magnetoelectric effect and its physical characteristics , focusing on semiconductors in electronic systems such as dynamic magnetoelectric effect the resulting electric field induced nonequilibrium spin polarization on the size and direction of spin polarization Rashba and Dresselhaus spin-orbit coupling interaction strength between . The third chapter focuses on the two-dimensional diffusion zone in Rashba-Dresselhaus spin-orbit coupling in electronic systems of the intrinsic spin Hall effect and its existence under the current limit . In this chapter, we propose a simple and clear physical picture , from the physical principle clearly explains why this type of spin - orbit coupling system of electric field -induced spin Hall effect can not exist in the thermodynamic limit .

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