Unsplit superconducting and time reversal symmetry breaking transitions in Sr₂RuO₄ under hydrostatic pressure and disorder.

ABSTRACT: There is considerable evidence that the superconducting state of Sr₂RuO₄ breaks time reversal symmetry. In the experiments showing time reversal symmetry breaking, its onset temperature, T_TRSB, is generally found to match the critical temperature, T_c, within resolution. In combination with evidence for even parity, this result has led to consideration of a d_xz ± id_yz order parameter. The degeneracy of the two components of this order parameter is protected by symmetry, yielding T_TRSB = T_c, but it has a hard-to-explain horizontal line node at k_z = 0. Therefore, s ± id and d ± ig order parameters are also under consideration. These avoid the horizontal line node, but require tuning to obtain T<

SUBMITTER: Grinenko V 

PROVIDER: S-EPMC8225887 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature