Phase diagram of interacting Fermi gas in spin–orbit coupled square lattices
The spin–orbit (SO) coupled optical lattices have attracted considerable interest. In this paper, we investigate the phase diagram of the interacting Fermi gas with Rashba-type spin–orbit coupling (SOC) on a square optical lattice. The phase diagram is investigated in a wide range of atomic interact...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2015-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/17/7/073036 |
| _version_ | 1827873885531406336 |
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| author | Xin Zhang Wei Wu Gang Li Lin Wen Qing Sun An-Chun Ji |
| author_facet | Xin Zhang Wei Wu Gang Li Lin Wen Qing Sun An-Chun Ji |
| author_sort | Xin Zhang |
| collection | DOAJ |
| description | The spin–orbit (SO) coupled optical lattices have attracted considerable interest. In this paper, we investigate the phase diagram of the interacting Fermi gas with Rashba-type spin–orbit coupling (SOC) on a square optical lattice. The phase diagram is investigated in a wide range of atomic interactions and SOC strength within the framework of the cluster dynamical mean-field theory (CDMFT). We show that the interplay between the atomic interactions and SOC results in a rich phase diagram. In the deep Mott insulator regime, the SOC can induce diverse spin ordered phases. Whereas near the metal–insulator transition (MIT), the SOC tends to destroy the conventional antiferromagnetic fluctuations, giving rise to distinctive features of the MIT. Furthermore, the strong fluctuations arising from SOC may destroy the magnetic orders and trigger an order to disorder transition in close proximity of the MIT. |
| first_indexed | 2024-03-12T16:43:29Z |
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| id | doaj.art-688f23b670914187982cc6b6c3889a25 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:43:29Z |
| publishDate | 2015-01-01 |
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| series | New Journal of Physics |
| spelling | doaj.art-688f23b670914187982cc6b6c3889a252023-08-08T14:20:57ZengIOP PublishingNew Journal of Physics1367-26302015-01-0117707303610.1088/1367-2630/17/7/073036Phase diagram of interacting Fermi gas in spin–orbit coupled square latticesXin Zhang0Wei Wu1Gang Li2Lin Wen3Qing Sun4An-Chun Ji5Center for Theoretical Physics, Department of Physics, Capital Normal University , Beijing 100048, People's Republic of ChinaCentre de Physique Théorique, Ecole Polytechnique , 91128 Palaiseau Cedex, FranceLehrstuhl fuer Theoretische Physick, Universität Wuerzburg , 97074 Wuerzburg, GermanyCollege of Physics and Electronic Engineering, Chongqing Normal University , Chongqing, 401331, People's Republic of ChinaCenter for Theoretical Physics, Department of Physics, Capital Normal University , Beijing 100048, People's Republic of ChinaCenter for Theoretical Physics, Department of Physics, Capital Normal University , Beijing 100048, People's Republic of ChinaThe spin–orbit (SO) coupled optical lattices have attracted considerable interest. In this paper, we investigate the phase diagram of the interacting Fermi gas with Rashba-type spin–orbit coupling (SOC) on a square optical lattice. The phase diagram is investigated in a wide range of atomic interactions and SOC strength within the framework of the cluster dynamical mean-field theory (CDMFT). We show that the interplay between the atomic interactions and SOC results in a rich phase diagram. In the deep Mott insulator regime, the SOC can induce diverse spin ordered phases. Whereas near the metal–insulator transition (MIT), the SOC tends to destroy the conventional antiferromagnetic fluctuations, giving rise to distinctive features of the MIT. Furthermore, the strong fluctuations arising from SOC may destroy the magnetic orders and trigger an order to disorder transition in close proximity of the MIT.https://doi.org/10.1088/1367-2630/17/7/073036spin–orbit couplingmetal-insulator transitioncluster dynamical mean-field theory |
| spellingShingle | Xin Zhang Wei Wu Gang Li Lin Wen Qing Sun An-Chun Ji Phase diagram of interacting Fermi gas in spin–orbit coupled square lattices New Journal of Physics spin–orbit coupling metal-insulator transition cluster dynamical mean-field theory |
| title | Phase diagram of interacting Fermi gas in spin–orbit coupled square lattices |
| title_full | Phase diagram of interacting Fermi gas in spin–orbit coupled square lattices |
| title_fullStr | Phase diagram of interacting Fermi gas in spin–orbit coupled square lattices |
| title_full_unstemmed | Phase diagram of interacting Fermi gas in spin–orbit coupled square lattices |
| title_short | Phase diagram of interacting Fermi gas in spin–orbit coupled square lattices |
| title_sort | phase diagram of interacting fermi gas in spin orbit coupled square lattices |
| topic | spin–orbit coupling metal-insulator transition cluster dynamical mean-field theory |
| url | https://doi.org/10.1088/1367-2630/17/7/073036 |
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