1109.6681 (Timo Hyart et al.)

Competition between d-wave and topological p-wave superconductivity in
the doped Kitaev-Heisenberg model    [PDF]

Timo Hyart, Anthony R. Wright, Giniyat Khaliullin, Bernd Rosenow

The competition between Kitaev and Heisenberg interactions away from half filling is studied for the the hole-doped Kitaev-Heisenberg $t$-$J_K$-$J_H$ model on a honeycomb lattice. While the isotropic Heisenberg coupling supports a time-reversal violating d-wave singlet state, we find that the Kitaev interaction favors a time-reversal invariant p-wave superconducting phase, which obeys the rotational symmetries of the microscopic model, and is robust for $J_H\mu_c$.

View original: http://arxiv.org/abs/1109.6681