Competition between d-wave and topological p-wave superconducting phases in the doped Kitaev-Heisenberg model
Timo Hyart, Anthony R. Wright, Giniyat Khaliullin, Bernd Rosenow
DOI 10.1103/PhysRevB.85.140510 · Physical Review B
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Abstract
The competition between Kitaev and Heisenberg interactions away from half filling is studied for the hole-doped Kitaev-Heisenberg t-JK-JH 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 JH<JK/2. Within the p-wave superconducting phase, a critical chemical potential |μ|=μc≈t separates a topologically trivial phase for |μ|<μc from a topologically nontrivial Z2 time-reversal invariant spin-triplet phase for |μ|>μc.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Li2IrO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Na2IrO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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