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Upper critical field Hc2 in Bechgaard salts (TMTSF)2PF6

Ana D Folgueras12* and Kazumi Maki3

Author Affiliations

1 Departamento de Física, Universidad de Oviedo, 33007 Oviedo, Spain

2 Instituto de Ciencia de Materiales de Madrid, C.S.I.C, Cantoblanco, 28049 Madrid, Spain

3 Department of Physics & Astronomy, University of Southern California, Los Angeles, CA 90089-0484, USA


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PMC Physics B 2008, 1:19 doi:10.1186/1754-0429-1-19

Published: 9 December 2008

Abstract

The symmetry of the superconductivity in Bechgaard salts is still unknown, though the triplet pairing has been established by Hc2 and NMR for (TMTSF)2PF6. The large upper critical field at T = 0K (Hc2 ~ 5 Tesla) both for <a onClick="popup('http://www.physmathcentral.com/1754-0429/1/19/mathml/M1','MathML',630,470);return false;" target="_blank" href="http://www.physmathcentral.com/1754-0429/1/19/mathml/M1">View MathML</a> and <a onClick="popup('http://www.physmathcentral.com/1754-0429/1/19/mathml/M2','MathML',630,470);return false;" target="_blank" href="http://www.physmathcentral.com/1754-0429/1/19/mathml/M2">View MathML</a> also indicates strongly the triplet pairing.

Here we start with a low energy effective Hamiltonian and study the temperature dependence of the corresponding Hc2(T)'s.

The present analysis suggests that one chiral f-wave superconductor should be the most likely candidate near the upper critical field.

PACS Codes: 74.70.Kn ; 74.20.Rp; 74.25.Op.