单层石墨烯中弱耦合极化子的性质?

量子电子学报

单层石墨烯中弱耦合极化子的性质?

贾彩红1，丁朝华1**，王蕊2

1.内蒙古民族大学物理与电子信息学院，内蒙古通辽 028043； 2.内蒙古通辽市科尔沁区第三中学，内蒙古通辽 028043

出版日期:2019-05-28 发布日期:2019-05-14
通讯作者: 丁朝华（1962-），女，内蒙古通辽人，硕士研究生，教授，硕士生导师，主要从事凝聚态光学性质和低维量子系统电子性质的研究。 E-mail: dzhaohua@126.com
作者简介:贾彩红(1992-)，女，内蒙古包头人，在读研究生，主要从事低维量子系统电子性质的研究。 E-mail:2677299740@qq.com
基金资助:
Supported by National Natural Science Foundation of China (国家自然科学基金项目11464033）资助项目

The Properties of Weak Coupling Polaron in Monolayer Graphene

JIA Cai-Hong 1 ， DING Zhao-Hua1** ， WANG Rui2

1.College of Physics and Electronic Information, Inner Mongolia University for Nationalites , Tongliao, 028043, 2.The third middle school of Inner Mongolia Tongliao city Korqin distract, Tongliao, 028043)

Published:2019-05-28 Online:2019-05-14

摘要/Abstract

摘要： 利用LLP幺正变换与线性组合算符相结合的方法研究了单层石墨烯（MG）中弱耦合极化子的性质。得出了单层石墨烯中弱耦合极化子的基态能量、第一激发态能量和跃迁能与振动频率、声子的德拜截止波数之间的依赖关系。结果表明，单层石墨烯中极化子的基态能量、第一激发态能量和跃迁能均为德拜截止波数的增函数；当振动频率增大时，基态能量随之增加，第一激发态能量先增加后减小再增加，直到趋于稳定的值，跃迁能量先增加后减小。

关键词: 单层石墨烯, 弱耦合, 极化子, 基态能量, 第一激发态能量

Abstract: The LLP variational method as well as linear combination operator are used to study the properties of weak coupling polarons in monolayer graphene (MG) .It is found that the relationships between the ground state energy of weak coupling polarons and Debye wavenumber of the phonon, the vibrational frequency. At the same time, the first excited state energy and transition energy of the polaron has a linear relationship with the debye cut-off wavenumber(DW), and the vibrational frequency. The result of numerical calculation shows: The ground state energy, the first excited state energy and TE of the polaron in MG can be tunabled by controlling the DW and vibrational frequency. The the ground state energy increased with the increase of DW and vibrational frequency and the first excited state energy and transition energy are not amonotone function with DW and vibrational frequency.

Key words: monolayer graphene；weak coupling, polaron, ground state energy ;the first excited state energy

贾彩红1，丁朝华1**，王蕊2 . 单层石墨烯中弱耦合极化子的性质?[J]. 量子电子学报.

JIA Cai-Hong 1,DING Zhao-Hua1**,WANG Rui2 . The Properties of Weak Coupling Polaron in Monolayer Graphene[J]. Chinese Journal of Quantum Electronics.

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