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Research article

Upper critical field H_c2 in Bechgaard salts (TMTSF)₂PF₆

Ana D Folgueras^1,2 and Kazumi Maki³

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

author email corresponding author email

PMC Physics B 2008, 1:19doi: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 H_c2 and NMR for (TMTSF)₂PF₆. The large upper critical field at T = 0K (H_c2 ~ 5 Tesla) both for and also indicates strongly the triplet pairing.

Here we start with a low energy effective Hamiltonian and study the temperature dependence of the corresponding H_c2(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.