Fate of the superconducting ground state on the Moyal plane

Basu, Prasad and Chakraborty, Biswajit and Vaidya, Sachindeo (2010) Fate of the superconducting ground state on the Moyal plane. In: Physics Letters B, 690 (4). pp. 431-435.

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Abstract

It is known that Berry curvature of the band structure of certain crystals can lead to effective noncommutativity between spatial coordinates. Using the techniques of twisted quantum field theory, we investigate the question of the formation of a paired state of twisted fermions in such a system. We find that to leading order in the noncommutativity parameter, the gap between the non-interacting ground state and the paired state is smaller compared to its commutative counterpart. This suggests that BCS type superconductivity, if present in such systems, is more fragile and easier to disrupt. (C) 2010 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	Physics Letters B
Publisher:	Elsevier science
Additional Information:	Copyright of this article belongs to Elsevier science.
Keywords:	Noncommutativity;Superconductivity
Department/Centre:	Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited:	02 Aug 2010 07:33
Last Modified:	19 Sep 2010 06:13
URI:	http://eprints.iisc.ac.in/id/eprint/31074

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