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Topological superconductors with spin-triplet pairings and Majorana Fermi arcs |
| Shi Huang(黄石) and Xi Luo(罗熙)† |
| College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China |
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Abstract We construct a three-dimensional topological superconductor Bogoliubov-de Gennes (BdG) Hamiltonian with the normal state being a three-dimensional topological insulator. By introducing inter-orbital spin-triplet pairings term $\varDelta_3$, there are topological Majorana nodes in the bulk and they are connected by Majorana Fermi arcs on the surface, similar to the case of Weyl semimetal. Furthermore, by adding an inversion-breaking term to the normal state, momentum-independent pairing terms with different parities can coexist in the BdG Hamiltonian, which creates more Majorana modes similar to Andreev bound states and a richer phase diagram.
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Received: 11 January 2024
Revised: 19 April 2024
Accepted manuscript online:
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PACS:
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73.20.At
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(Surface states, band structure, electron density of states)
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74.20.-z
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(Theories and models of superconducting state)
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03.65.Vf
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(Phases: geometric; dynamic or topological)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 12174067 and 11804223). |
Corresponding Authors:
Xi Luo
E-mail: xiluo@usst.edu.cn
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Cite this article:
Shi Huang(黄石) and Xi Luo(罗熙) Topological superconductors with spin-triplet pairings and Majorana Fermi arcs 2024 Chin. Phys. B 33 087301
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