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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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|
|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|
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