Conductance of a junction between a normal metal and a Berezinskii superconductor
Ya. V. Fominov
L. D. Landau Institute for Theoretical Physics RAS, 119334 Moscow, Russia
PACS: 74.20.Rp, 74.25.Fy, 74.45.+c, 74.50.+r
Abstract
The conductance of a junction between a normal metal and a
superconductor having the symmetry proposed by Berezinskii is studied
theoretically. The main feature of this symmetry is the odd frequency
dependence of the anomalous Green function, which makes possible the
s-wave triplet superconducting state (the Berezinskii
superconductor). The Andreev reflection (which links positive and negative
energies) is sensitive to the energetic symmetry; as a result, the
conductance of the junction involving the Berezinskii superconductor is
qualitatively different from the case of a conventional superconductor.
Experimentally, the obtained results can be employed to test the possibility
of the Berezinskii superconductivity proposed for NaxCoO2 and to
identify the odd-ω component predicted for superconductor-ferromagnet
systems.