Pairing state competition in quasi-one-dimensional organic superconductors in a magnetic field

✍ Scribed by Hirohito Aizawa; Kazuhiko Kuroki; Yukio Tanaka

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 227 KB
• Volume: 470
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2009.11.113

✦ Synopsis

We microscopically study the effect of the magnetic field on the pairing state competition between spin singlet, spin triplet, and the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state in a model for quasi-onedimensional organic conductors ðTMTSFÞ 2 X. We obtain phase diagram in the temperature-magnetic field space. We show that consecutive pairing transition from singlet pairing to FFLO state and further to S z ¼ 1 triplet pairing can take place upon increasing the magnetic field when 2k F charge fluctuations coexist with 2k F spin fluctuations.