Time-reversal symmetry breaking surface states of d-wave superconductors induced by an additional order parameter with negative T_c

Takeshi Tomizawa, Kazuhiro Kuboki

Surface states of d_{x^2-y^2}-wave superconductors are studied using the Ginzburg-Landau (GL) theory. For a [110] surface it has been known that the time-reversal symmetry (T) brea…