Zero-Magnetic-Field Spin Splitting of Polaron's Ground State Energy Induced by Rashba Spin-Orbit Interaction |
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作者姓名: | LIU Jia XIAO Jing-Ling |
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作者单位: | College of Physics and Electromechanics, Inner Mongolia University for Nationalities, Tongliao 028043, China |
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基金项目: | The project supported by National Natural Science Foundation of China under Grant No. 10347004. |
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摘 要: | We study theoretically the ground state energy of a polaron near the interface of a polar-polar semiconductor by considering the Rashba spin-orbit (SO) coupling with the Lee-Low-Pines intermediate coupling method. Our numerical results show that the Rashba SO interaction originating from the inversion asymmetry in the heterostructure splits the ground state energy of the polaron. The electron area/density and vector dependence of the ratio of the SO interaction to the total ground state energy or other energy composition are obvious. One can see that even without any external magnetic field, the ground state energy can be split by the Rashba SO interaction, and this split is not a single but a complex one. Since the presents of the phonons, whose energy gives negative contribution to the polaron's, the spin-splitting states of the polaron are more stable than electron's.
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关 键 词: | 不对称异质结构 三角势能逼近 Rashba自旋轨道交互 数字结果 |
收稿时间: | 2005-11-17 |
修稿时间: | 2005-11-172006-01-23 |
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