【摘 要】
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We study theoretically the possible ground states of the undoped and doped Kitaev-Heisenberg model on a triangular lattice.At half-filling, a combination of exact diagonalization and the four-sublatti
【出 处】
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第十三届国际凝聚态理论与计算材料学会议(The 13th International Conference on Con
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We study theoretically the possible ground states of the undoped and doped Kitaev-Heisenberg model on a triangular lattice.At half-filling, a combination of exact diagonalization and the four-sublattice transformation analysis suggests one possible exotic phase and four magnetically ordered phases including a stripe and a spiral orders.Based on the Schwinger-fermion mean-field method, we indentify the exotic phase to be a gapped spin liquid near the Kitaev limit with an antiferromagnetic-type coupling.For the hole-doped system, we find that the antiferromagnetic-type Kitaev interaction favors a chiral dx2-y2 +idxy superconductivity, and the ferromagnetic-type Kitaev interaction favors a time-reversal invariant topological p-wave superconductivity.
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