Impurity-induced Shiba bound state in the BCS-BEC crossover regime of two-dimensional Fermi superfluid

doi:10.1088/1674-1056/28/7/070501

IMR OpenIR

	Impurity-induced Shiba bound state in the BCS-BEC crossover regime of two-dimensional Fermi superfluid
	Shao, Siqi 1,2; Zhou, Kezhao 3; Zhang, Zhidong 1,2
通讯作者	Zhou, Kezhao(kezhaozhou@gmail.com)
	2019-07-01
发表期刊	CHINESE PHYSICS B
ISSN	1674-1056
卷号	28 期号:7 页码:6
摘要	For a two-dimensional ultra-cold Fermi superfluid with an effective static magnetic impurity, we theoretically investigated the variation of the Yu-Shiba-Rusinov (YSR) bound state in the Bardeen-Cooper-Schrieffer (BCS) to Bose-Einstein condensation (BEC) crossover regime. Within the framework of mean-field theory, analytical results of the YSR bound state energy were obtained as a function of the interaction parameters. First, when the background Fermi superfluid system stays in the weakly interacting BCS regime, we found that the YSR bound state energy is linearly dependent on the gap parameter with its coefficient slightly different from previous results. Second, we discovered re-entrance phenomena for the YSR state and an upper bound of the strength of the interaction between the paired atoms. By carefully analyzing the bound state energy as a function of the interaction parameters, we obtained a phase diagram showing the existence of the YSR state. Finally, we concluded that the re-entrance phenomena and the critical point can be easily experimentally detected through measurement of radio-frequency spectroscopy and density of states using current experimental techniques.
关键词	ultra-cold quantum gases BCS-BEC crossover magnetic impurity Yu-Shiba-Rusinov (YSR) state
资助者	National Key R&D Program of China
DOI	10.1088/1674-1056/28/7/070501
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2017YFA0206302]
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
WOS记录号	WOS:000476828700001
出版者	IOP PUBLISHING LTD
引用统计	被引频次：4[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/321006/134851
专题	中国科学院金属研究所
通讯作者	Zhou, Kezhao
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China 3.Hunan Univ Technol, Coll Sci, Dept Phys, Zhuzhou 412007, Peoples R China
推荐引用方式 GB/T 7714	Shao, Siqi,Zhou, Kezhao,Zhang, Zhidong. Impurity-induced Shiba bound state in the BCS-BEC crossover regime of two-dimensional Fermi superfluid[J]. CHINESE PHYSICS B,2019,28(7):6.
APA	Shao, Siqi,Zhou, Kezhao,&Zhang, Zhidong.(2019).Impurity-induced Shiba bound state in the BCS-BEC crossover regime of two-dimensional Fermi superfluid.CHINESE PHYSICS B,28(7),6.
MLA	Shao, Siqi,et al."Impurity-induced Shiba bound state in the BCS-BEC crossover regime of two-dimensional Fermi superfluid".CHINESE PHYSICS B 28.7(2019):6.