声子色散对单层石墨烯中弱耦合极化子性质的影响

量子电子学报 ›› 2020, Vol. 37 ›› Issue (1): 88-92.

声子色散对单层石墨烯中弱耦合极化子性质的影响

杨洪涛1,2，冀文慧1,2*

1 集宁师范学院物理学院，内蒙古乌兰察布 012000； 2 集宁师范学院凝聚态物理研究所，内蒙古乌兰察布 012000

收稿日期:2019-09-25 修回日期:2019-10-25 出版日期:2020-01-28 发布日期:2020-01-28
通讯作者: 冀文慧 E-mail:jiwenhui2000@aliyun.com
作者简介:杨洪涛（1980—），女，内蒙古通辽人，硕士，副教授，主要从事凝聚态光学性质方面的研究。E-mail：yanghongtao_2000@aliyun.com
基金资助:
Supported by Research Program of Science and Technology at Universities of Inner Mongolia Autonomous Region（内蒙古自治区高等学校科学研究项目，NJZC16317），Program for Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region（内蒙古自治区高等学校青年科技英才支持计划，NJYT-17-B37）

Phonon dispersion effect on the weak coupling polaron in monolayer graphene

#br# YANG Hongtao1,2, JI Wenhui1,2

1 School of Physics, Inner Mongolia Jining Normal University, Ulanqab 012000, China; 2 Institute of Condensed Matter Physics, Inner Mongolia Jining Normal University, Ulanqab 012000, China

Received:2019-09-25 Revised:2019-10-25 Published:2020-01-28 Online:2020-01-28

摘要/Abstract

摘要： 利用线性组合算符和LLP变分相结合的方法，计及纵光学（LO）声子色散，研究了声子色散对单层石墨烯弱耦合极化子性质的影响．在抛物近似下导出了单层石墨烯弱耦合极化子基态能和零朗道能级的分裂能随声子色散系数的变化关系．数值计算结果表明基态能量随德拜截止频率增大而增大，零朗道能级的分裂能级差随声子色散系数的增大而减小．

关键词: 光电子学, 石墨烯, 极化子, 线性组合算符, 声子色散

Abstract: The influence of the phonon dispersion on the weak coupling polaron in monolayer graphene was studied by using the linear combination operator and LLP unitary transformation method. Taking account of the longitudinal optical (LO) phonons dispersion in a parabolic approximation, the ground state energy and the zero-Landau level splitting energy in monolayer graphene as a function of the coefficient of the phonon dispersion were obtained. Numerical calculation results show that the ground state energy increases with increasing the Debye cut-off wave number, the zero-Landau level splitting energy decreases with increasing the coefficient of phonon dispersion.

Key words: optoelectronics, graphene, polaron, linear combination operator, phonon dispersion

中图分类号:

O469

杨洪涛冀文慧. 声子色散对单层石墨烯中弱耦合极化子性质的影响[J]. 量子电子学报, 2020, 37(1): 88-92.

YANG Hongtao, JI Wenhui, . Phonon dispersion effect on the weak coupling polaron in monolayer graphene[J]. Chinese Journal of Quantum Electronics, 2020, 37(1): 88-92.

参考文献

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