| 双量子阱中有自旋轨道耦合的场助电子共振隧穿 |
| |
| 引用本文： | 胡丽云,周斌.双量子阱中有自旋轨道耦合的场助电子共振隧穿[J].湖北大学学报(自然科学版),2011,33(3):383-388. |
| |
| 作者姓名： | 胡丽云 周斌 |
| |
| 作者单位： | 湖北大学物理学与电子技术学院,湖北武汉,430062 |
| |
| 基金项目： | 国家自然科学基金(10974046); 湖北省自然科学基金(2009CDB360); 湖北省教育厅重点项目(D20101004)资助 |
| |
| 摘 要： | 研究在自旋轨道耦合和周期振动场的作用下，电子隧穿双量子阱结构的透射系数和自旋极化率．通过数值计算发现：隧穿后电子的自旋简并消除，得到与自旋相关的共振峰．电子隧穿宽势阱时出现对称的Breit-Wigner共振峰，而隧穿窄势阱时出现不对称的Fano共振峰．研究也发现通过调节入射能量和中间势垒的宽度，可以改变共振峰的振幅和位置．利用这个原理可以设计可调的自旋过滤器，实现对自旋的调控．
|
| 关 键 词： | 自旋轨道耦合 隧穿几率 自旋极化率 |
Field-assisted electron resonance tunneling with spin-orbit coupling in double quantum well structure |
| |
| HU Liyun,ZHOU Bin.Field-assisted electron resonance tunneling with spin-orbit coupling in double quantum well structure[J].Journal of Hubei University(Natural Science Edition),2011,33(3):383-388. |
| |
| Authors: | HU Liyun ZHOU Bin |
| |
| Institution: | HU Liyun,ZHOU Bin (School of Physics and Electronic Technology,Hubei University,Wuhan 430062,China) |
| |
| Abstract: | Investigated the electronic transmission probability and spin polarizability through double quantum well structure with Dresselhaus spin-orbit coupling and applied oscillating fields.By the numerical calculations,it showed that spin-orbit coupling eliminated the spin degeneracy and led to the splitting of resonance peak.Electron tunneling through the broad potential well,transmission spectra were the symmetric Breit-Wigner resonance peaks,while through the narrow potential well,transmission spectra were the... |
| |
| Keywords: | spin-orbit coupling transmission probability spin polarizability |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
