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dc.contributor.authorHuang, Shin-Mingen_US
dc.contributor.authorTsai, Wei-Fengen_US
dc.contributor.authorChung, Chung-Houen_US
dc.contributor.authorMou, Chung-Yuen_US
dc.date.accessioned2019-04-03T06:44:18Z-
dc.date.available2019-04-03T06:44:18Z-
dc.date.issued2016-02-19en_US
dc.identifier.issn2469-9950en_US
dc.identifier.urihttp://dx.doi.org/10.1103/PhysRevB.93.054518en_US
dc.identifier.urihttp://hdl.handle.net/11536/132619-
dc.description.abstractThe ground state of the large Hubbard U limit of a honeycomb lattice near half filling is known to be a singlet d + id-wave superconductor. It is also known that this d + id superconductor exhibits a chiral p + ip pairing locally at the Dirac cone, characterized by a 2Z topological invariant. By constructing a dual transformation, we demonstrate that this 2Z topological superconductor is equivalent to a collection of two topological ferromagnetic insulators. As a result of the duality, the topology of the electronic structures for a d + id superconductor is controllable via the change of the chemical potential by tuning the gate voltage. In particular, instead of always being a chiral superconductor, we find that the d + id superconductor undergoes a topological phase transition from a chiral superconductor to a quasihelical superconductor as the gap amplitude or the chemical potential decreases. The quasihelical superconducting phase is found to be characterized by a topological invariant in the pseudospin charge sector with vanishing both the Chern number and the spin Chern number. We further elucidate the topological phase transition by analyzing the relationship between the topological invariant and the rotation symmetry. Due to the angular momentum carried by the gap function and spin-orbit interactions, we show that by placing d + id superconductors in proximity to ferromagnets, varieties of chiral superconducting phases characterized by higher Chern numbers can be accessed, providing a platform for hosting large numbers of Majorana modes at edges.en_US
dc.language.isoen_USen_US
dc.titleDuality in topological superconductors and topological ferromagnetic insulators in a honeycomb latticeen_US
dc.typeArticleen_US
dc.identifier.doi10.1103/PhysRevB.93.054518en_US
dc.identifier.journalPHYSICAL REVIEW Ben_US
dc.citation.volume93en_US
dc.citation.issue5en_US
dc.citation.spage0en_US
dc.citation.epage0en_US
dc.contributor.department電子物理學系zh_TW
dc.contributor.departmentDepartment of Electrophysicsen_US
dc.identifier.wosnumberWOS:000370485900002en_US
dc.citation.woscount4en_US
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