FFLO Superfluids in 2D Spin-Orbit Coupled Fermi Gases

We show that the combination of spin-orbit coupling and in-plane Zeeman field in a two-dimensional degenerate Fermi gas can lead to a larger parameter region for Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phases than that using spin-imbalanced Fermi gases. The resulting FFLO superfluids are also more s...

Descripción completa

Detalles Bibliográficos
Autores principales: Zheng, Zhen, Gong, Ming, Zhang, Yichao, Zou, Xubo, Zhang, Chuanwei, Guo, Guangcan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2014
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4187011/
https://www.ncbi.nlm.nih.gov/pubmed/25288379
http://dx.doi.org/10.1038/srep06535
_version_ 1782338144070270976
author Zheng, Zhen
Gong, Ming
Zhang, Yichao
Zou, Xubo
Zhang, Chuanwei
Guo, Guangcan
author_facet Zheng, Zhen
Gong, Ming
Zhang, Yichao
Zou, Xubo
Zhang, Chuanwei
Guo, Guangcan
author_sort Zheng, Zhen
collection PubMed
description We show that the combination of spin-orbit coupling and in-plane Zeeman field in a two-dimensional degenerate Fermi gas can lead to a larger parameter region for Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phases than that using spin-imbalanced Fermi gases. The resulting FFLO superfluids are also more stable due to the enhanced energy difference between FFLO and conventional Bardeen-Cooper-Schrieffer (BCS) excited states. We clarify the crucial role of the symmetry of Fermi surface on the formation of finite momentum pairing. The phase diagram for FFLO superfluids is obtained in the BCS-BEC crossover region and possible experimental observations of FFLO phases are discussed.
format Online
Article
Text
id pubmed-4187011
institution National Center for Biotechnology Information
language English
publishDate 2014
publisher Nature Publishing Group
record_format MEDLINE/PubMed
spelling pubmed-41870112014-10-17 FFLO Superfluids in 2D Spin-Orbit Coupled Fermi Gases Zheng, Zhen Gong, Ming Zhang, Yichao Zou, Xubo Zhang, Chuanwei Guo, Guangcan Sci Rep Article We show that the combination of spin-orbit coupling and in-plane Zeeman field in a two-dimensional degenerate Fermi gas can lead to a larger parameter region for Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phases than that using spin-imbalanced Fermi gases. The resulting FFLO superfluids are also more stable due to the enhanced energy difference between FFLO and conventional Bardeen-Cooper-Schrieffer (BCS) excited states. We clarify the crucial role of the symmetry of Fermi surface on the formation of finite momentum pairing. The phase diagram for FFLO superfluids is obtained in the BCS-BEC crossover region and possible experimental observations of FFLO phases are discussed. Nature Publishing Group 2014-10-07 /pmc/articles/PMC4187011/ /pubmed/25288379 http://dx.doi.org/10.1038/srep06535 Text en Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Zheng, Zhen
Gong, Ming
Zhang, Yichao
Zou, Xubo
Zhang, Chuanwei
Guo, Guangcan
FFLO Superfluids in 2D Spin-Orbit Coupled Fermi Gases
title FFLO Superfluids in 2D Spin-Orbit Coupled Fermi Gases
title_full FFLO Superfluids in 2D Spin-Orbit Coupled Fermi Gases
title_fullStr FFLO Superfluids in 2D Spin-Orbit Coupled Fermi Gases
title_full_unstemmed FFLO Superfluids in 2D Spin-Orbit Coupled Fermi Gases
title_short FFLO Superfluids in 2D Spin-Orbit Coupled Fermi Gases
title_sort fflo superfluids in 2d spin-orbit coupled fermi gases
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4187011/
https://www.ncbi.nlm.nih.gov/pubmed/25288379
http://dx.doi.org/10.1038/srep06535
work_keys_str_mv AT zhengzhen fflosuperfluidsin2dspinorbitcoupledfermigases
AT gongming fflosuperfluidsin2dspinorbitcoupledfermigases
AT zhangyichao fflosuperfluidsin2dspinorbitcoupledfermigases
AT zouxubo fflosuperfluidsin2dspinorbitcoupledfermigases
AT zhangchuanwei fflosuperfluidsin2dspinorbitcoupledfermigases
AT guoguangcan fflosuperfluidsin2dspinorbitcoupledfermigases

Ejemplares similares