典型文献
Theoretical study of broadband near-field optical spectrum of twisted bilayer graphene
文献摘要：
We theoretically study the broadband near-field optical spectrum of twisted bilayer graphene(TBG)at various twist angles near the magic angle using two different models.The spectrum at low Fermi energy is characterized by a series of peaks that are almost at the same energies as the peaks in the far-field optical conductivity of TBG.When the Fermi energy is near a van Hove singularity,an additional strong peak appears at finite energy in the near-field spectrum,which has no counterpart in the optical conductivity.Based on a detailed calculation of the plasmon dispersion,we show that these spectroscopic features are associated with interband and intraband plasmons,which can provide critical information about the local band structure and plasmonic excitations in TBG.The near-field peaks evolve systematically with the twist angle,so they can serve as fingerprints for identifying the spatial dependent twist angle in TBG samples.Our findings pave the way for future experimental studies of the novel optical properties of TBG in the nanoscale.
文献关键词：
中图分类号：
作者姓名：
Lu Wen;Yijun Liu;Guoyu Luo;Xinyu Lv;Kaiyuan Wang;Wang Zhu;Lei Wang;Zhiqiang Li
作者机构：
College of Physics,Sichuan University,Chengdu 610064,China;National Laboratory of Solid-State Microstructures,School of Physics,Nanjing University,Nanjing 210093,China
文献出处：
引用格式：
[1]Lu Wen;Yijun Liu;Guoyu Luo;Xinyu Lv;Kaiyuan Wang;Wang Zhu;Lei Wang;Zhiqiang Li-.Theoretical study of broadband near-field optical spectrum of twisted bilayer graphene)[J].物理学前沿,2022(04):67-74
A类：
Hove
B类：
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AB值：
0.538806
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