Weyl points and topological nodal superfluids in a face-centered-cubic optical lattice
We point out that a face-centered-cubic (fcc) optical lattice, which can be realized by a simple scheme using three lasers, provides one a highly controllable platform for creating Weyl points and topological nodal superfluids in ultracold atoms. In noninteracting systems, Weyl points automatically...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2018
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| Online Access: | https://hdl.handle.net/10356/81397 http://hdl.handle.net/10220/46615 |
| _version_ | 1826126389294661632 |
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| author | Lang, Li-Jun Zhang, Shao-Liang Law, K. T. Zhou, Qi |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Lang, Li-Jun Zhang, Shao-Liang Law, K. T. Zhou, Qi |
| author_sort | Lang, Li-Jun |
| collection | NTU |
| description | We point out that a face-centered-cubic (fcc) optical lattice, which can be realized by a simple scheme using three lasers, provides one a highly controllable platform for creating Weyl points and topological nodal superfluids in ultracold atoms. In noninteracting systems, Weyl points automatically arise in the Floquet band structure when shaking such fcc lattices, and sophisticated design of the tunneling is not required. More interestingly, in the presence of attractive interaction between two hyperfine spin states, which experience the same shaken fcc lattice, a three-dimensional topological nodal superfluid emerges, and Weyl points show up as the gapless points in the quasiparticle spectrum. One could either create a double Weyl point of charge 2, or split it into two Weyl points of charge 1, which can be moved in the momentum space by tuning the interactions. Correspondingly, the Fermi arcs at the surface may be linked with each other or separated as individual ones. |
| first_indexed | 2024-10-01T06:51:35Z |
| format | Journal Article |
| id | ntu-10356/81397 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:51:35Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/813972023-02-28T19:31:43Z Weyl points and topological nodal superfluids in a face-centered-cubic optical lattice Lang, Li-Jun Zhang, Shao-Liang Law, K. T. Zhou, Qi School of Physical and Mathematical Sciences Ultracold Gases Weyl Semimetal DRNTU::Science::Physics We point out that a face-centered-cubic (fcc) optical lattice, which can be realized by a simple scheme using three lasers, provides one a highly controllable platform for creating Weyl points and topological nodal superfluids in ultracold atoms. In noninteracting systems, Weyl points automatically arise in the Floquet band structure when shaking such fcc lattices, and sophisticated design of the tunneling is not required. More interestingly, in the presence of attractive interaction between two hyperfine spin states, which experience the same shaken fcc lattice, a three-dimensional topological nodal superfluid emerges, and Weyl points show up as the gapless points in the quasiparticle spectrum. One could either create a double Weyl point of charge 2, or split it into two Weyl points of charge 1, which can be moved in the momentum space by tuning the interactions. Correspondingly, the Fermi arcs at the surface may be linked with each other or separated as individual ones. Published version 2018-11-09T03:45:38Z 2019-12-06T14:30:04Z 2018-11-09T03:45:38Z 2019-12-06T14:30:04Z 2017 Journal Article Lang, L.-J., Zhang, S.-L., Law, K. T., & Zhou, Q. (2017). Weyl points and topological nodal superfluids in a face-centered-cubic optical lattice. Physical Review B, 96(3), 035145-. doi:10.1103/PhysRevB.96.035145 2469-9950 https://hdl.handle.net/10356/81397 http://hdl.handle.net/10220/46615 10.1103/PhysRevB.96.035145 en Physical Review B © 2017 American Physical Society (APS). This paper was published in Physical Review B and is made available as an electronic reprint (preprint) with permission of American Physical Society (APS). The published version is available at: [http://dx.doi.org/10.1103/PhysRevB.96.035145]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 5 p. application/pdf |
| spellingShingle | Ultracold Gases Weyl Semimetal DRNTU::Science::Physics Lang, Li-Jun Zhang, Shao-Liang Law, K. T. Zhou, Qi Weyl points and topological nodal superfluids in a face-centered-cubic optical lattice |
| title | Weyl points and topological nodal superfluids in a face-centered-cubic optical lattice |
| title_full | Weyl points and topological nodal superfluids in a face-centered-cubic optical lattice |
| title_fullStr | Weyl points and topological nodal superfluids in a face-centered-cubic optical lattice |
| title_full_unstemmed | Weyl points and topological nodal superfluids in a face-centered-cubic optical lattice |
| title_short | Weyl points and topological nodal superfluids in a face-centered-cubic optical lattice |
| title_sort | weyl points and topological nodal superfluids in a face centered cubic optical lattice |
| topic | Ultracold Gases Weyl Semimetal DRNTU::Science::Physics |
| url | https://hdl.handle.net/10356/81397 http://hdl.handle.net/10220/46615 |
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