Raman spectroscopy study of rotated double-layer graphene: Misorientation-angle dependence of electronic structure

Kwanpyo Kim, Sinisa Coh, Liang Z. Tan, William Regan, Jong Min Yuk, Eric Chatterjee, M. F. Crommie, Marvin L. Cohen, Steven G. Louie, A. Zettl

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Abstract

We present a systematic Raman study of unconventionally stacked double-layer graphene, and find that the spectrum strongly depends on the relative rotation angle between layers. Rotation-dependent trends in the position, width and intensity of graphene 2D and G peaks are experimentally established and accounted for theoretically. Our theoretical analysis reveals that changes in electronic band structure due to the interlayer interaction, such as rotational-angle dependent Van Hove singularities, are responsible for the observed spectral features. Our combined experimental and theoretical study provides a deeper understanding of the electronic band structure of rotated double-layer graphene, and leads to a practical way to identify and analyze rotation angles of misoriented double-layer graphene.

Original languageEnglish
Article number246103
JournalPhysical review letters
Volume108
Issue number24
DOIs
Publication statusPublished - 2012 Jun 14

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Kim, K., Coh, S., Tan, L. Z., Regan, W., Yuk, J. M., Chatterjee, E., Crommie, M. F., Cohen, M. L., Louie, S. G., & Zettl, A. (2012). Raman spectroscopy study of rotated double-layer graphene: Misorientation-angle dependence of electronic structure. Physical review letters, 108(24), [246103]. https://doi.org/10.1103/PhysRevLett.108.246103