Interaction-Driven Metal-Insulator Transition in Strained Graphene.
Phys Rev Lett
; 115(18): 186602, 2015 Oct 30.
Article
em En
| MEDLINE
| ID: mdl-26565484
ABSTRACT
The question of whether electron-electron interactions can drive a metal to insulator transition in graphene under realistic experimental conditions is addressed. Using three representative methods to calculate the effective long-range Coulomb interaction between π electrons in graphene and solving for the ground state using quantum Monte Carlo methods, we argue that, without strain, graphene remains metallic and changing the substrate from SiO_{2} to suspended samples hardly makes any difference. In contrast, applying a rather large-but experimentally realistic-uniform and isotropic strain of about 15% seems to be a promising route to making graphene an antiferromagnetic Mott insulator.
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01-internacional
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MEDLINE
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En
Ano de publicação:
2015
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Article