光学学报, 2011, 31 (8): 0827001, 网络出版: 2011-07-19  

量子棒中弱耦合极化子有效质量的温度依赖性

Temperature Dependence of Effective Mass of Weak-Coupling Polaron in a Quantum Rod
作者单位
1 河北科技师范学院凝聚态物理研究所, 河北 秦皇岛 066004
2 内蒙古民族大学物理与电子信息学院, 内蒙古 通辽 028043
摘要
基于Tokuda-Lee-Low-Pines变分法研究了温度对非均匀抛物限制势下量子棒中弱耦合极化子有效质量的影响,推导出量子棒中弱耦合极化子的有效质量m*随量子棒纵横比e′、电子声子耦合强度α和温度参数γ的变化规律。数值计算结果表明,量子棒中弱耦合极化子的横向有效质量m*‖和纵向有效质量m*z均随电子声子耦合强度α的增加而增大,随温度T的升高而减小;量子棒中极化子的横向有效质量m*‖随量子棒纵横比e′的增加而增大,纵向有效质量m*z随e′的增加而减小。
Abstract
The influences of temperature on the effective mass of the weak-coupling polaron in an asymmetric parabolic quantum rod are studied based on Tokuda-Lee-Low-Pines variational method. The change law of the effective mass m* of the weak-coupling polarons with the aspect ratio e′ of the quantum rod, the electron-phonon coupling strength α and the temperature parameter γ are derived. Numerical results indicate that the horizontal effective mass m*‖ and the vertical effective mass mz of the weak-coupling polaron in quantum rod will increase with the increase of the electron-phonon coupling strength α, and decrease with the increase of temperature T. The horizontal effective mass m*‖ of the polaron will increase with the increase of the aspect ratio e′ of the quantum rod. On the contrary, the vertical effective mass mz of the polaron will decrease with the increase of the aspect ratio e′.

额尔敦朝鲁, 乌云其木格, 韩超. 量子棒中弱耦合极化子有效质量的温度依赖性[J]. 光学学报, 2011, 31(8): 0827001. Eerdunchaolu, Wuyunqimuge, Han Chao. Temperature Dependence of Effective Mass of Weak-Coupling Polaron in a Quantum Rod[J]. Acta Optica Sinica, 2011, 31(8): 0827001.

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