• 文献标题:   Measurement of Filling-Factor-Dependent Magnetophonon Resonances in Graphene Using Raman Spectroscopy
  • 文献类型:   Article
  • 作  者:   KIM Y, POUMIROL JM, LOMBARDO A, KALUGIN NG, GEORGIOU T, KIM YJ, NOVOSELOV KS, FERRARI AC, KONO J, KASHUBA O, FAL KO VI, SMIRNOV D
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW LETTERS
  • ISSN:   0031-9007 EI 1079-7114
  • 通讯作者地址:   Natl High Magnet Field Lab
  • 被引频次:   22
  • DOI:   10.1103/PhysRevLett.110.227402
  • 出版年:   2013

▎ 摘  要

We perform polarization-resolved Raman spectroscopy on graphene in magnetic fields up to 45 T. This reveals a filling-factor-dependent, multicomponent anticrossing structure of the Raman G peak, resulting from magnetophonon resonances between magnetoexcitons and E-2g phonons. This is explained with a model of Raman scattering taking into account the effects of spatially inhomogeneous carrier densities and strain. Random fluctuations of strain-induced pseudomagnetic fields lead to increased scattering intensity inside the anticrossing gap, consistent with the experiments.