Possible high-temperature superconducting state with a d plus id pairing symmetry in doped graphene

Pathak, Sandeep and Shenoy, Vijay B and Baskaran, G (2010) Possible high-temperature superconducting state with a d plus id pairing symmetry in doped graphene. In: Physical Review B, 81 (8).

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Abstract

Motivated by a suggestion in our earlier work [G. Baskaran, Phys. Rev. B 65, 212505 (2002)], we study electron correlation driven superconductivity in doped graphene where on-site correlations are believed to be of intermediate strength. Using an extensive variational Monte Carlo study of the repulsive Hubbard model and a correlated ground state wave function, we show that doped graphene supports a superconducting ground state with a d+id pairing symmetry. We estimate superconductivity reaching room temperatures at an optimal doping of about 15%-20%. Our work suggests that correlations can stabilize superconductivity even in systems with intermediate coupling.

Item Type:	Journal Article
Publication:	Physical Review B
Publisher:	The American Physical Society.
Additional Information:	Copyright of this article belongs to The American Physical Society.
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	25 Mar 2010 07:18
Last Modified:	19 Sep 2010 05:57
URI:	http://eprints.iisc.ac.in/id/eprint/26387

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