| Impurity-induced Shiba bound state in the BCS-BEC crossover regime of two-dimensional Fermi superfluid | |
| Shao, Siqi1,2; Zhou, Kezhao3; Zhang, Zhidong1,2 | |
| Corresponding Author | Zhou, Kezhao(kezhaozhou@gmail.com) |
| 2019-07-01 | |
| Source Publication | CHINESE PHYSICS B
 |
| ISSN | 1674-1056 |
| Volume | 28Issue:7Pages:6 |
| Abstract | 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. |
| Keyword | ultra-cold quantum gases BCS-BEC crossover magnetic impurity Yu-Shiba-Rusinov (YSR) state |
| Funding Organization | National Key R&D Program of China |
| DOI | 10.1088/1674-1056/28/7/070501 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key R&D Program of China[2017YFA0206302] |
| WOS Research Area | Physics |
| WOS Subject | Physics, Multidisciplinary |
| WOS ID | WOS:000476828700001 |
| Publisher | IOP PUBLISHING LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/134851 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Zhou, Kezhao |
| Affiliation | 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 |
| Recommended Citation 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. |
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