Tunable odd-frequency triplet pairing states and skyrmion modes in chiral p-wave superconductor.
Tunable odd-frequency triplet pairing states and skyrmion modes in chiral p-wave superconductor.
复制标题
手性p波超导体中可调谐奇频三重态配对态和斯格明子模式
DOI：
10.1038/s41598-017-10152-0
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发表时间：
2017-08-29
影响因子：
4.6
通讯作者：
Zhou SP
中科院分区：
文献类型：
--
作者：
Lou YF;Wen L;Zha GQ;Zhou SP
为了研究手性p波超导盘束缚态的性质，对Bogliubov-de Gennes方程进行了自洽求解。结果表明，在涡旋核处诱导s波或具有奇频和自旋三重态对称的混合d波和s波态，取决于配对态的手性和涡旋拓扑结构。我们还发现，奇频三重态偶宇称束缚态可以用局部非磁势来控制。有趣的是，在适当的势幅下，零能OTE束缚态可以在远离涡旋核心和局域势一定距离处稳定下来。如果将粒子-空穴对称性应用于零能量OTE束缚态，则期望马约拉纳费米子模式可能存在。此外，还发现存在具有整数拓扑电荷的skyrmion模式。
Bogliubov-de Gennes equations are solved self-consistently to investigate the properties of bound states in chiral p-wave superconductive disks. It shows that either an s-wave or the mixed d- and s-wave state with odd-frequency and spin-triplet symmetry is induced at the vortex core, depending both on the chirality of the pairing states and on the vortex topology. It is also found that the odd-frequency triplet even parity (OTE) bound state can be manipulated with a local non-magnetic potential. Interestingly, with an appropriate potential amplitude, the zero-energy OTE bound state can be stabilized at a distance from the vortex core and from the local potential. Possible existences of the Majorana fermion modes are expected if the particle-hole symmetry property is applied to the zero-energy OTE bound state. Moreover, skyrmion modes with an integer topological charge have been found to exist.