›› 2015, Vol. 24 ›› Issue (1): 17301-017301.doi: 10.1088/1674-1056/24/1/017301

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Tight-binding electron-phonon coupling and band renormalization in graphene

张德生a b, 康广震b, 李俊a b   

  1. a National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China;
    b Department of Physics, Nanjing University, Nanjing 210093, China
  • 收稿日期:2014-07-02 修回日期:2014-08-29 出版日期:2015-01-05 发布日期:2015-01-05
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 10574063, 11275097, 10935001, 11274166, and 11075075), the National Basic Research Program of China (Grant No. 2012CB921504), and the Research Fund for the Doctoral Program of Higher Education, China (Grant No. 2012009111002).

Tight-binding electron-phonon coupling and band renormalization in graphene

Zhang De-Sheng (张德生)a b, Kang Guang-Zhen (康广震)b, Li Jun (李俊)a b   

  1. a National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China;
    b Department of Physics, Nanjing University, Nanjing 210093, China
  • Received:2014-07-02 Revised:2014-08-29 Online:2015-01-05 Published:2015-01-05
  • Contact: Zhang De-Sheng E-mail:zhangdesheng99@gmail.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 10574063, 11275097, 10935001, 11274166, and 11075075), the National Basic Research Program of China (Grant No. 2012CB921504), and the Research Fund for the Doctoral Program of Higher Education, China (Grant No. 2012009111002).

摘要: The kink structure in the quasiparticle spectrum of electrons in graphene observed at 200 meV below the Fermi level by angle-resolved photoemission spectroscopy (ARPES) was claimed to be caused by a tight-binding electron-phonon (e-ph) coupling in the previous theoretical studies. However, we numerically find that the e-ph coupling effect in this approach is too weak to account for the ARPES data. The former agreement between this approach and the ARPES data is due to an enlargement of the coupling constant by almost four times.

关键词: graphene, electron-phonon interaction, kink, effective mass-renormalization parameter

Abstract: The kink structure in the quasiparticle spectrum of electrons in graphene observed at 200 meV below the Fermi level by angle-resolved photoemission spectroscopy (ARPES) was claimed to be caused by a tight-binding electron-phonon (e-ph) coupling in the previous theoretical studies. However, we numerically find that the e-ph coupling effect in this approach is too weak to account for the ARPES data. The former agreement between this approach and the ARPES data is due to an enlargement of the coupling constant by almost four times.

Key words: graphene, electron-phonon interaction, kink, effective mass-renormalization parameter

中图分类号:  (Electronic structure of graphene)

  • 73.22.Pr
71.10.-w (Theories and models of many-electron systems) 71.18.+y (Fermi surface: calculations and measurements; effective mass, g factor) 71.38.-k (Polarons and electron-phonon interactions)