Optical manifestations of symmetry breaking in bilayer graphene

Abergel, D. S. L. and Falko, Vladimir (2012) Optical manifestations of symmetry breaking in bilayer graphene. Physical review B, 86 (4): 041410. ISSN 1098-0121

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We propose a spectroscopic method of identifying broken symmetry states of bilayer graphene. We demonstrate theoretically that, in contrast to gapped states, a strained bilayer crystal or nematic phase of the electronic liquid are distinguishable by the dependence of the line shape of absorption on the polarization of the light. This property is characteristic for both the infrared and far-infrared spectral ranges, which correspond to the absorption by transitions between low-energy bands and split bands, and transitions between the low-energy valence and conduction bands, respectively.

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Journal Article
Journal or Publication Title:
Physical review B
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©2012 American Physical Society
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Deposited On:
22 Apr 2013 10:08
Last Modified:
31 Dec 2023 00:27