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Article overview
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Competition between d-wave and topological p-wave superconductivity in the doped Kitaev-Heisenberg model | Timo Hyart
; Anthony R. Wright
; Giniyat Khaliullin
; Bernd Rosenow
; | Date: |
29 Sep 2011 | Abstract: | 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 $J_H<J_K/2$. Within the p-wave superconducting phase, a critical chemical
potential $mu_c approx t$ separates a topologically trivial phase for $|mu|<
mu_c$ from a topologically non-trivial $Z_2$ time-reversal invariant
spin-triplet phase for $|mu|>mu_c$. | Source: | arXiv, 1109.6681 | Services: | Forum | Review | PDF | Favorites |
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