Lifshitz transition enhanced triplet p(z)-wave superconductivity in hydrogen-doped KCr3As3
文献类型：期刊论文
| 作者 | Zhang, Ming; Hao, Juan-Juan; Wu, Xianxin1,2; Yang, Fan |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2022 |
| 卷号 | 105期号:13页码:134509 |
| ISSN号 | 2469-9950 |
| 关键词 | RB |
| DOI | 10.1103/PhysRevB.105.134509 |
| 英文摘要 | The recently synthesized air-insensitive hydrogen-doped KCr3As3 superconductor has aroused great research interest. This material has, for the first time in the research area of the quasi-one-dimensional (quasi-1D) Cr-based superconductivity (SC), realized a tunability through charge doping, which will potentially significantly push the development of this area. Here, based on the band structure from first-principles calculations, we construct a six-band tight-binding model equipped with multiorbital Hubbard interactions and adopt the random-phase-approximation approach to study the hydrogen-doping dependence of the pairing symmetry and superconducting T-c. Under the rigid-band approximation, our pairing phase diagram is occupied by the triplet p(z)-wave pairing throughout the hydrogen-doping regime x is an element of (0.4, 1) in which SC has been experimentally detected. Remarkably, the x dependence of T-c shows a peak at the three-dimensional-quasi-1D Lifshitz transition point, although the total density of states exhibits a dip there. The corresponding doping level is near the experimental estimation of the optimal doping level. A thorough investigation of the band structure reveals type-II van Hove singularities (VHSs) in the gamma band, which favor the formation of the triplet SC. It turns out that the gamma Fermi surface (FS) comprises two flat quasi-1D FS sheets almost parallel to the k(z) = 0 plane and six almost perpendicular tubelike FS sheets, and the type-II VHS just lies in the boundary between these two FS parts. Furthermore, the vertical bar k(z)vertical bar of the van Hove planes reaches the maximum near the Lifshitz-transition point, which pushes the T-c of the p(z)-wave SC to the maximum. Our results appeal for more experimental access into this intriguing superconductor. |
| 学科主题 | Materials Science ; Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/27786]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 作者单位 | 1.Beijing Inst Technol, Sch Phys, Beijing 100081, Peoples R China 2.Max Planck Inst Festkorperforsch, Heisenbergstr 1, D-70569 Stuttgart, Germany 3.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Ming,Hao, Juan-Juan,Wu, Xianxin,et al. Lifshitz transition enhanced triplet p(z)-wave superconductivity in hydrogen-doped KCr3As3[J]. PHYSICAL REVIEW B,2022,105(13):134509. |
| APA | Zhang, Ming,Hao, Juan-Juan,Wu, Xianxin,&Yang, Fan.(2022).Lifshitz transition enhanced triplet p(z)-wave superconductivity in hydrogen-doped KCr3As3.PHYSICAL REVIEW B,105(13),134509. |
| MLA | Zhang, Ming,et al."Lifshitz transition enhanced triplet p(z)-wave superconductivity in hydrogen-doped KCr3As3".PHYSICAL REVIEW B 105.13(2022):134509. |
入库方式： OAI收割
来源：理论物理研究所
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