title: Effect of the vortices on the nuclear spin relaxation rate in the unconventional pairing states of the organic superconductor (TMTSF)2PF6.
abstract: This Letter theoretically discusses quasiparticle states and nuclear spin relaxation rates T1-1 in the quasi-one-dimensional superconductor (TMTSF)2PF6 under a magnetic field applied parallel to the conduction chains. We study the effects of Josephson-type vortices on T1(-1) by solving the Bogoliubov-de Gennes equation for p-, d- or f-wave pairing interactions. In the presence of line nodes in pairing functions, T1(-1) is proportional to T in sufficiently low temperatures because quasiparticles induced by vortices at the Fermi energy relax spins. We also try to identify the pairing symmetry of (TMTSF)2PF6.
authors.affiliation: Department of Applied Physics, Hokkaido University, Sapporo 060-8628, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Takigawa
authors.forename: M
authors.initials: M
authors.lastname: Ichioka
authors.forename: K
authors.initials: K
authors.lastname: Kuroki
authors.forename: Y
authors.initials: Y
authors.lastname: Asano
authors.forename: Y
authors.initials: Y
authors.lastname: Tanaka