Raman spectroscopy study of twisted tetralayer graphene | Zendy

Wang Ying Ying | Zendy; Jiang Jie | Zendy; Gao Chuan Wei | Zendy; Nan Hai Yan | Zendy; Ni Zhen Hua | Zendy; Wang Dong | Zendy; Zhong Bo | Zendy; Wen Guang Wu | Zendy

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Raman spectroscopy study of twisted tetralayer graphene

Author(s) -

Wang Ying Ying,

Jiang Jie,

Gao Chuan Wei,

Nan Hai Yan,

Ni Zhen Hua,

Wang Dong,

Zhong Bo,

Wen Guang Wu

Publication year - 2016

Publication title -

journal of raman spectroscopy

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.748

H-Index - 110

eISSN - 1097-4555

pISSN - 0377-0486

DOI - 10.1002/jrs.4893

Subject(s) - graphene , raman spectroscopy , bilayer graphene , electronic structure , materials science , superlattice , excitation , condensed matter physics , nanotechnology , optoelectronics , optics , physics , quantum mechanics

We present a systematic Raman study of twisted tetralayer graphene ( t (2 + 2)LG), under excitation of two laser lines. In t (2 + 2)LG samples, top Bernal stacked bilayer graphene (2LG stands for Bernal‐stacked bilayer graphene) twists different angle relative to bottom 2LG. It is found that 2D and 2D′ peaks of t (2 + 2)LG show positive wavenumber shift relative to those of 2LG. We propose a simplified electronic band structure for t (2 + 2)LG; interlayer interaction‐induced changing in electronic band structure can be used to understand the aforementioned spectral features. The electronic structures of t (2 + 2)LG samples are then probed from resonant Raman studies of 2D and 2D′ peaks using two laser lines; electronic dispersions in t (2 + 2)LG samples are given. Our study facilitates understanding of twist angle‐dependent electronic properties of tetralayer graphene superlattice. Copyright © 2016 John Wiley & Sons, Ltd.

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