Phase diagram of interacting Fermi gas in spin-orbit coupled square lattices
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- 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 induceThe 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.…
Autor(en): | Xin Zhang, Wei Wu, Gang Li, Lin Wen, Qing Sun, An-Chun Ji |
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URN: | urn:nbn:de:bvb:20-opus-151475 |
Dokumentart: | Artikel / Aufsatz in einer Zeitschrift |
Institute der Universität: | Fakultät für Physik und Astronomie / Physikalisches Institut |
Sprache der Veröffentlichung: | Englisch |
Titel des übergeordneten Werkes / der Zeitschrift (Englisch): | New Journal of Physics |
Erscheinungsjahr: | 2015 |
Band / Jahrgang: | 17 |
Heft / Ausgabe: | 073036 |
Originalveröffentlichung / Quelle: | New Journal of Physics 17 (2015) 073036. DOI: 10.1088/1367-2630/17/7/073036 |
DOI: | https://doi.org/10.1088/1367-2630/17/7/073036 |
Allgemeine fachliche Zuordnung (DDC-Klassifikation): | 5 Naturwissenschaften und Mathematik / 53 Physik / 539 Moderne Physik |
Freie Schlagwort(e): | atomic gases; cluster dynamical mean-field theory; hubbard-model; mean-field theory; metal-insulator transition; mott insulator; optical lattice; physics transition; quantum gases; spin-orbit coupling; superfluid; ultracold; weak ferromagnetism |
Datum der Freischaltung: | 19.10.2017 |
Lizenz (Deutsch): | CC BY: Creative-Commons-Lizenz: Namensnennung |