Journal
PHYSICAL REVIEW B
Volume 79, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.045421
Keywords
carrier density; crystal structure; electronic structure; ground states; total energy; graphene
Funding
- Fundacao para a Ciencia e a Tecnologia (FCT) [SFRH/BPD/27182/2006]
- Centro de Fisica do Porto
- POCI [PTDC/FIS/64404/2006]
- FCT [CONC-REEQ/443/2005]
- U. S. Department of Energy [DE-FG02-08ER46512]
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We consider the instability of bilayer graphene with respect to a distorted configuration in the same spirit as the model introduced by Su [Phys. Rev. Lett. 42, 1698 (1979)]. By computing the total energy of a distorted bilayer, we conclude that the ground state of the system favors a finite distortion. We explore how the equilibrium configuration changes with carrier density and an applied potential difference between the two layers.
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