| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Ground State and Its Topological Properties of Three-Dimensional Spin-Orbit Coupled Degenerate Fermi Gases |
| Long Xiong1†, Ming Gong2,3†, Zhao-Xiang Fang4*, and Rui Sun5* |
1International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
2Key Lab of Quantum Information of Chinese Academy of Sciences, School of Physics, University of Science and Technology of China, Hefei 230026, China
3Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
4School of Physical Science and Technology, Xinjiang University, Urumqi 830046, China
5College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
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| Cite this article: |
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Long Xiong, Ming Gong, Zhao-Xiang Fang et al 2023 Chin. Phys. Lett. 40 127402 |
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Abstract Three-dimensional (3D) degenerate Fermi gases in the presence of spin-orbit coupling, inducing various kinds of physical findings and phenomena, have attracted tremendous attention in these years. We investigate the 3D spin-orbit coupled degenerate Fermi gases in theory and first present the analytic expression of their ground state. Our study provides an innovative perspective into understanding of the topological properties of 3D unconventional superconductors, and describes the topological phase transitions in trivial and topological phase areas. Further, such a system is provided with a richer set of Cooper pairings than traditional superconductors. The dual Cooper pairs with same spin directions emerge and exhibit peculiar behaviors, leading to topological phase transitions. Our study and discussion can be generalized to some other types of unconventional superconductors and areas of optical lattices.
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Received: 31 October 2023
Published: 21 December 2023
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| PACS: |
74.20.Fg
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(BCS theory and its development)
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71.70.Ej
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(Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)
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03.75.Ss
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(Degenerate Fermi gases)
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74.20.-z
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(Theories and models of superconducting state)
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