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Published in: Journal of Materials Science 2/2014

01-01-2014

Optical absorption spectrum of rotated trilayer graphene

Authors: Julian D. Correa, Monica Pacheco, Eric Suárez Morell

Published in: Journal of Materials Science | Issue 2/2014

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Abstract

Using ab initio calculations we have studied the optical linear response of different configurations of twisted trilayer graphene systems. We have found that when one of the outer layers is rotated the system shows an angle-dependent optical spectrum as its twisted bilayer counterpart; however, in this case there are two absorption peaks located in the visible range of the spectrum and one more in the intermediate infrared range for large relative rotation angles. When two layers are rotated the spectrum exhibits only two absorption peaks in the visible range revealing information about the two relative rotation angles between the layers in the structure. All these absorption peaks in the visible range shift to the intermediate infrared range for small angles.

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Footnotes
1
A rotated unit cell around 14.5° contains more than 1600 atoms making unviable a DFT calculation. We have calculated instead the closest in angle and smallest commensurate unit cell
 
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Metadata
Title
Optical absorption spectrum of rotated trilayer graphene
Authors
Julian D. Correa
Monica Pacheco
Eric Suárez Morell
Publication date
01-01-2014
Publisher
Springer US
Published in
Journal of Materials Science / Issue 2/2014
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-013-7744-4

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