Coexistence of antiferromagnetism and topological superconductivity on the honeycomb lattice Hubbard model
Coexistence of antiferromagnetism and topological superconductivity on the honeycomb lattice Hubbard model
复制标题
蜂窝晶格哈伯德模型上反铁磁性与拓扑超导的共存
DOI：
10.1103/physrevb.102.245140
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发表时间：
2017
影响因子：
3.7
通讯作者：
Z. Gu
中科院分区：
文献类型：
--
作者：
Yang Qi;L. Fu;K. Sun;Z. Gu
受最近蜂窝晶格上掺杂~t~(-J)模型的数值模拟的启发，我们在蜂窝晶格Hubbard模型上研究了单重态和三重态对的超导电性。结果表明，半填充附近的反铁磁序诱导了自旋单态和自旋三态共存的超导态。我们得到的超导态有一个拓扑相变，这个相变将一个拓扑平凡态和一个陈数为2的非平凡态分开。文中还讨论了这种拓扑超导电性的可能的实验实现。
Motivated by the recent numerical simulations for doped $t$-$J$ model on honeycomb lattice, we study superconductivity of singlet and triplet pairing on honeycomb lattice Hubbard model. We show that a superconducting state with coexisting spin-singlet and spin-triplet pairings is induced by the antiferromagnetic order near half-filling. The superconducting state we obtain has a topological phase transition that separates a topologically trivial state and a nontrivial state with Chern number two. Possible experimental realization of such a topological superconductivity is also discussed.