三角量子阱中极化子的Rashba效应

J4 ›› 2018, Vol. 35 ›› Issue (5): 625-630.

三角量子阱中极化子的Rashba效应

单淑萍

龙岩学院机电工程学院，福建龙岩，364012

收稿日期:2017-10-24 修回日期:2018-02-12 出版日期:2018-09-28 发布日期:2018-09-29
通讯作者: 单淑萍（1976-），女，内蒙古赤峰人，研究生学历，副教授，主要从事凝聚态理论的研究。 E-mail:ssping04@126.com
作者简介:单淑萍（1976-），女，内蒙古赤峰人，研究生学历，副教授，主要从事凝聚态理论的研究。
基金资助:
Supported by the Education Department A type Foundation of Fujian Province NO. JA14488(福建省教育厅A类基金编号：JA15488) and Longyan College National Fund Development Project NO.LG2014003(龙岩学院国家启动基金项目编号LG2014003

Polaron Rashba Effect in a Triangular Quantum Well

Shu-Ping Shan

College of Electromechanics, Longyan University, Longyan, Fujian 364012,Chima

Received:2017-10-24 Revised:2018-02-12 Published:2018-09-28 Online:2018-09-29

摘要/Abstract

摘要：

采用LLP变分法研究了Rashba效应对三角量子阱中极化子性质的影响，得到了极化子基态能量的表达式。在Rashba效应影响下，分别讨论了基态能量与波矢、电子面密度以及电子-声子耦合强度之间的关系。数值计算结果表明：基态能量是波矢和电子面密度的增函数，而是电子-声子耦合强度的减函数。由于Rashba效应的影响，基态能量分裂成两支。

关键词: 三角量子阱，Rashba效应，基态能量，极化子

Abstract:

Rashba effect on the properties of polaron in a triangular quantum well is investigated within LLP variational method and the expression of the polaron ground state energy is derived by us. Under the influence of the Rashba effect, we discuss the relations between the ground state energy with the wave vector, the electron areal density and the electron-phonon coupling strength, respectively. The results show that the ground state energy is an increasing function of the wave vector and the electron areal density. But it is a decreasing function of the electron-phonon coupling strength. Due to the Rashba effect, the ground state energy splits two branches.

Key words: Triangular quantum well, Rashba effect, Ground state energy, Polaron

单淑萍. 三角量子阱中极化子的Rashba效应[J]. J4, 2018, 35(5): 625-630.

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