Ground state properties of a two-dimensional Fermi superfluid with anisotropic spin-orbit coupling

doi:10.1016/j.jpcs.2017.08.019

IMR OpenIR

	Ground state properties of a two-dimensional Fermi superfluid with anisotropic spin-orbit coupling
	Zhou, Kezhao; Zhang, Zhidong
通讯作者	Zhou, Kezhao(kezhaozhou@gmail.com) ; Zhang, Zhidong(zdzhang@imr.ac.cn)
	2019-05-01
发表期刊	JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
ISSN	0022-3697
卷号	128 页码:207-210
摘要	In this study, we performed a theoretical investigation of the ground state properties of a two-dimensional ultra cold Fermi superfluid with anisotropic spin-orbit coupling (SOC). In the absence of the Zeeman field, the system evolved from a weak coupling BCS regime to a strongly interacting BEC regime (BCS-BEC crossover) with increases in either the two-particle interaction strength or the SOC parameters. We focused on the behaviors of the pairing parameter and density of states (DOS) when the anisotropic parameter of the SOC increased. Surprisingly, we discovered that the gap parameter decreased as the anisotropic parameters increased, but the DOS at the Fermi surface exhibited non-monotonic behavior as a function of the anisotropic parameter. In the presence of the Zeeman field, we considered a particular type of topological phase transition by obtaining the analytical result for the topological invariant and we related this directly to the quantum phase transition with a sudden change in the ground state wave-function. The effects of higher partial wave pairing terms on this topological phase transition were also considered in this study.
关键词	BCS-BEC crossover Spin-orbit coupling Ultra-cold atom
资助者	National Key R&D Program of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences
DOI	10.1016/j.jpcs.2017.08.019
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2017YFA0206302] ; National Natural Science Foundation of China[51331006] ; National Natural Science Foundation of China[51590883] ; National Natural Science Foundation of China[11204321] ; Chinese Academy of Sciences[KJZD-EW-M05-3]
WOS研究方向	Chemistry ; Physics
WOS类目	Chemistry, Multidisciplinary ; Physics, Condensed Matter
WOS记录号	WOS:000472693100021
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/134089
专题	中国科学院金属研究所
通讯作者	Zhou, Kezhao; Zhang, Zhidong
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Kezhao,Zhang, Zhidong. Ground state properties of a two-dimensional Fermi superfluid with anisotropic spin-orbit coupling[J]. JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS,2019,128:207-210.
APA	Zhou, Kezhao,&Zhang, Zhidong.(2019).Ground state properties of a two-dimensional Fermi superfluid with anisotropic spin-orbit coupling.JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS,128,207-210.
MLA	Zhou, Kezhao,et al."Ground state properties of a two-dimensional Fermi superfluid with anisotropic spin-orbit coupling".JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS 128(2019):207-210.