Signatures of spin-polarized p-wave superconductivity in the kagome material RbV$_3$Sb$_5$
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2024
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866912976752082944 |
|---|---|
| author | Wang, Shuo Feng, Xilin Fang, Jing-Zhi Peng, Jia-Peng Sun, Zi-Ting Yang, Jia-Jie Liu, Jingchao Zhao, Jia-Ji Wang, Jian-Kun Liu, Xin-Jie Wu, Ze-Nan Sun, Shengbiao Kang, Ning Wu, Xiao-Song Zhang, Zhensheng Fu, Xuewen Law, Kam Tuen Lin, Ben-Chuan Yu, Dapeng |
| author_facet | Wang, Shuo Feng, Xilin Fang, Jing-Zhi Peng, Jia-Peng Sun, Zi-Ting Yang, Jia-Jie Liu, Jingchao Zhao, Jia-Ji Wang, Jian-Kun Liu, Xin-Jie Wu, Ze-Nan Sun, Shengbiao Kang, Ning Wu, Xiao-Song Zhang, Zhensheng Fu, Xuewen Law, Kam Tuen Lin, Ben-Chuan Yu, Dapeng |
| contents | The study of kagome materials has attracted much attention in the past few years due to the presence of many electron-electron interaction-driven phases in a single material. These include charge density waves, nematic phases, superconducting phases, and pair density waves. In this work, we report the discovery of intrinsic spin-polarized p-wave superconductivity in the thin-flake kagome material RbV$_3$Sb$_5$. Firstly, when an in-plane magnetic field is swept in opposite directions, we observe a unique form of hysteresis in magnetoresistance which is different from the hysteresis induced by extrinsic mechanisms such as flux-trapping or superheating and supercooling effects. The unconventional hysteresis indicates the emergence of an intrinsic time-reversal symmetry-breaking superconducting phase. Strikingly, at a fixed magnetic field, the finite-resistance state can be transitioned into the superconducting state by applying and subsequently removing a large current. Secondly, at temperatures around 400 mK, the re-entrance of superconductivity occurs during an in-plane field-sweeping process. This kind of re-entrance is asymmetric about the zero field axis and observed in all field directions for a fixed current direction, which is different from the re-entrance observed in conventional superconductors. These findings put very strong constraints on the possible superconducting pairing symmetry of RbV$_3$Sb$_5$. We point out that the pairing symmetry, which is consistent with the crystal symmetry and all the observed novel properties, is possibly a time-reversal symmetry-breaking, p-wave pairing with net spin polarization. Importantly, this p-wave pairing gives rise to a nodal topological superconducting state with Majorana flat bands on the sample edges. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_12592 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Signatures of spin-polarized p-wave superconductivity in the kagome material RbV$_3$Sb$_5$ Wang, Shuo Feng, Xilin Fang, Jing-Zhi Peng, Jia-Peng Sun, Zi-Ting Yang, Jia-Jie Liu, Jingchao Zhao, Jia-Ji Wang, Jian-Kun Liu, Xin-Jie Wu, Ze-Nan Sun, Shengbiao Kang, Ning Wu, Xiao-Song Zhang, Zhensheng Fu, Xuewen Law, Kam Tuen Lin, Ben-Chuan Yu, Dapeng Strongly Correlated Electrons Superconductivity The study of kagome materials has attracted much attention in the past few years due to the presence of many electron-electron interaction-driven phases in a single material. These include charge density waves, nematic phases, superconducting phases, and pair density waves. In this work, we report the discovery of intrinsic spin-polarized p-wave superconductivity in the thin-flake kagome material RbV$_3$Sb$_5$. Firstly, when an in-plane magnetic field is swept in opposite directions, we observe a unique form of hysteresis in magnetoresistance which is different from the hysteresis induced by extrinsic mechanisms such as flux-trapping or superheating and supercooling effects. The unconventional hysteresis indicates the emergence of an intrinsic time-reversal symmetry-breaking superconducting phase. Strikingly, at a fixed magnetic field, the finite-resistance state can be transitioned into the superconducting state by applying and subsequently removing a large current. Secondly, at temperatures around 400 mK, the re-entrance of superconductivity occurs during an in-plane field-sweeping process. This kind of re-entrance is asymmetric about the zero field axis and observed in all field directions for a fixed current direction, which is different from the re-entrance observed in conventional superconductors. These findings put very strong constraints on the possible superconducting pairing symmetry of RbV$_3$Sb$_5$. We point out that the pairing symmetry, which is consistent with the crystal symmetry and all the observed novel properties, is possibly a time-reversal symmetry-breaking, p-wave pairing with net spin polarization. Importantly, this p-wave pairing gives rise to a nodal topological superconducting state with Majorana flat bands on the sample edges. |
| title | Signatures of spin-polarized p-wave superconductivity in the kagome material RbV$_3$Sb$_5$ |
| topic | Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2405.12592 |