Hidden Reentrant and Larkin-Ovchinnikov-Fulde-Ferrell Superconducting Phases in a Magnetic Field in a (TMTSF)(2)ClO4

作者：Lebed A G^*

来源：Physical Review Letters, 2011, 107(8): 087004.

DOI：10.1103/PhysRevLett.107.087004

We solve a long-standing problem about a theoretical description of the upper critical magnetic field, parallel to conducting layers and perpendicular to conducting chains, in a (TMTSF)(2)ClO4 superconductor. In particular, we explain why the experimental upper critical field, H-c2(b') similar or equal to 6 T, is higher than both the quasiclassical upper critical field and the Clogston paramagnetic limit. We show that this property is due to the coexistence of the hidden reentrant and Larkin-Ovchinnikov-Fulde-Ferrell phases in a magnetic field in the form of three plane waves with nonzero momenta of the Cooper pairs. Our results are in good qualitative and quantitative agreement with the recent experimental measurements of H-c2(b') and support a singlet d-wave-like scenario of superconductivity in (TMTSF)(2)ClO4.

• 出版日期2011-8-19