title: Low-field superconducting phase of (TMTSF)2ClO4.
abstract: The low-field phase of the organic superconductor (TMTSF)(2)ClO(4) is studied by muon-spin rotation. The zero temperature limit of the magnetic penetration depth within the TMTSF layers is obtained to be λ(ab)(0) = 0.86(2) μm. Temperature dependence of the muon-spin relaxation shows no indication of gap nodes on the Fermi surface nor of any spontaneous fields due to time-reversal-symmetry breaking. The weight of evidence suggests that the symmetry of this low-field phase is odd-frequency p-wave singlet, a novel example of odd-frequency pairing in a bulk superconductor.
authors.affiliation: ISIS Facility, STFC Rutherford Appleton Laboratory, Chilton, Oxfordshire OX11 0QX, United Kingdom.
authors.forename: F L
authors.initials: FL
authors.lastname: Pratt
authors.forename: T
authors.initials: T
authors.lastname: Lancaster
authors.forename: S J
authors.initials: SJ
authors.lastname: Blundell
authors.forename: C
authors.initials: C
authors.lastname: Baines