论文标题
二维方晶格抗fiferromagnet中的手性马拉纳植物效率
Chiral Majorana Fermions in two dimensional square lattice antiferromagnet with proximity-induced superconductivity
论文作者
论文摘要
在二维方形晶格抗fiferromagnet中与旋转轨道耦合和非肌形态对称性的邻近性诱导的超导性和铁磁交换场的结合可以诱导与手性majoraana边缘状态的拓扑超导相。 Bogoliubov-De Gennes（BDG）Hamiltonian的晶格模型用于研究纳米骨中散装和手性Majorana边缘状态的相图。通过数值研究相图，我们发现，必须使用手性Majorana Edge状态的拓扑超导体相诱导超导配对参数的不均匀性或两个sublattices的交换场的不均匀性。某些拓扑超导体阶段的BDG Chern号为$ \ pm1 $或$ \ pm3 $，因此相应的纳米骨本分别具有一或三对手性Majoragan Edge状态。
Combination of proximity-induced superconductivity and ferromagnetic exchange field in a two-dimensional square-lattice antiferromagnet with spin-orbit coupling and nonsymmorphic symmetry can induce a topological superconductor phase with chiral Majorana edge states. The lattice model of the Bogoliubov-de Gennes (BdG) Hamiltonian was applied to study the phase diagram of bulks and chiral Majorana edge states in nanoribbons. By numerically studying the phase diagram, we found that the non-uniformity of either the superconducting pairing parameters or the exchange field at the two sublattices is necessary to induce a topological superconductor phase with chiral Majorana edge states. The BdG Chern number of certain topological superconductor phases is $\pm1$ or $\pm3$, such that the corresponding nanoribbons have one or three pairs of chiral Majorana edge states, respectively.
