Zone folding effect in Raman G-band intensity of twisted bilayer graphene
Name
Sato-2012-Zone folding effect in Raman G-band intensity of twisted bilayer graphene.pdf
Size
400.1 KB
Format
Adobe PDF
Checksum (MD5)
f6d5e8ca40da62d50206c58bcb9009ab
Author(s)
Sato, Kentaro
Saito, Riichiro
Cong, Chunxiao
Yu, Ting
Dresselhaus, Mildred
Date Issued
September 2012
Journal
Physical Review B
Publisher
American Physical Society
Citation
Sato, Kentaro et al. “Zone Folding Effect in Raman G-band Intensity of Twisted Bilayer Graphene.” Physical Review B 86.12 (2012). © 2012 American Physical Society
Version
Final published version
Abstract
The G-band Raman intensity is calculated for twisted bilayer graphene as a function of laser excitation energy based on the extended tight binding method. Here we explicitly consider the electron-photon and electron-phonon matrix elements of twisted bilayer graphene to calculate the resonance Raman intensity. The G-band Raman intensity is sensitive to the laser excitation energy and the twisting angle between the layers as a result of folding the electronic energy band structure. The Van Hove energy singularity, which is an electron transition energy between the conduction and valence bands, depends on n−m of the twisting vector (n,m). The relative intensity of the G band as a function of twisting vectors is presented, which should be useful for the experimental identification of the twisting angle.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevB.86.125414
