| Title: |
Expanded quantum vortex liquid regimes in the electron nematic superconductors FeSe₁₋ₓSₓ and FeSe₁₋ₓTeₓ |
| Authors: |
Čulo, M.; Licciardello, S.; Ishida, K.; Mukasa, K.; Ayres, J.; Buhot, J.; Hsu, Y.-T.; Imajo, S.; Qiu, M. W.; Saito, M.; Uezono, Y.; Otsuka, T.; Watanabe, T.; Kindo, K.; Shibauchi, T.; Kasahara, S.; Matsuda, Y.; Hussey, N. E. |
| Publisher Information: |
Springer Nature |
| Publication Year: |
2023 |
| Collection: |
Kyoto University Research Information Repository (KURENAI) / 京都大学学術情報リポジトリ |
| Subject Terms: |
Electronic properties and materials; Phase transitions and critical phenomena; Superconducting properties and materials |
| Description: |
In a quantum vortex liquid, the superconducting vortex lattice is melted by quantum fluctuations instead of thermal fluctuations. Here, the authors present high-field magnetotransport measurements of FeSe₁₋ₓSₓ and FeSe₁₋ₓTeₓ, which provide evidence for a broad quantum vortex liquid regime. The quantum vortex liquid (QVL) is an intriguing state of type-II superconductors in which intense quantum fluctuations of the superconducting (SC) order parameter destroy the Abrikosov lattice even at very low temperatures. Such a state has only rarely been observed, however, and remains poorly understood. One of the key questions is the precise origin of such intense quantum fluctuations and the role of nearby non-SC phases or quantum critical points in amplifying these effects. Here we report a high-field magnetotransport study of FeSe₁₋ₓSₓ and FeSe₁₋ₓTeₓ which show a broad QVL regime both within and beyond their respective electron nematic phases. A clear correlation is found between the extent of the QVL and the strength of the superconductivity. This comparative study enables us to identify the essential elements that promote the QVL regime in unconventional superconductors and to demonstrate that the QVL regime itself is most extended wherever superconductivity is weakest. |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
English |
| Relation: |
https://hdl.handle.net/2433/297328; Nature Communications; 14; 4150 |
| Availability: |
https://hdl.handle.net/2433/297328 |
| Rights: |
© The Author(s) 2023 ; This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. ; http://creativecommons.org/licenses/by/4.0/ |
| Accession Number: |
edsbas.28642194 |
| Database: |
BASE |