G-band Raman double resonance in twisted bilayer graphene: Evidence of band splitting and folding

Zhenhua Ni, Lei Liu, Yingying Wang, Zhe Zheng, Lain-Jong Li, Ting Yu, and Zexiang Shen
Phys. Rev. B 80, 125404 – Published 9 September 2009

Abstract

The stacking faults (deviates from Bernal) will break the translational symmetry of multilayer graphenes and modify their electronic and optical behaviors to the extent depending on the interlayer coupling strength. This paper addresses the stacking-induced band splitting and folding effect on the electronic band structure of twisted bilayer graphene. Based on the first-principles density-functional theory study, we predict that the band folding effect of graphene layers may enable the G band Raman double resonance in the visible excitation range. Such prediction is confirmed experimentally with our Raman observation that the resonant energies of the resonant G mode are strongly dependent on the stacking geometry of graphene layers.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 17 June 2009

DOI:https://doi.org/10.1103/PhysRevB.80.125404

©2009 American Physical Society

Authors & Affiliations

Zhenhua Ni1, Lei Liu1, Yingying Wang1, Zhe Zheng1, Lain-Jong Li2, Ting Yu1, and Zexiang Shen1,*

  • 1School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
  • 2School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore

  • *Corresponding author. zexiang@ntu.edu.sg

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 80, Iss. 12 — 15 September 2009

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×