| Title: |
Collapse of metallicity and high-Tc superconductivity in the high-pressure phase of FeSe0.89S0.11 |
| Authors: |
Reiss, Pascal; McCollam, Alix; Zajicek, Zachary; Haghighirad, Amir A.; Coldea, Amalia I. |
| Source: |
npj Quantum Materials, 9, Article no: 73 ; ISSN: 2397-4648 |
| Publisher Information: |
Nature Research |
| Publication Year: |
2024 |
| Collection: |
KITopen (Karlsruhe Institute of Technologie) |
| Subject Terms: |
ddc:530; Physics; info:eu-repo/classification/ddc/530 |
| Description: |
We investigate the high-pressure phase of the iron-based superconductor FeSe0.89S0.11 using transport and tunnel diode oscillator studies using diamond anvil cells. We construct detailed pressure-temperature phase diagrams that indicate that the superconducting critical temperature is strongly enhanced by more than a factor of four towards 40 K above 4 GPa. The resistivity data reveal signatures of a fan-like structure of non-Fermi liquid behaviour which could indicate the existence of a putative quantum critical point buried underneath the superconducting dome around 4.3 GPa. With further increasing the pressure, the zero-field electrical resistivity develops a non-metallic temperature dependence and the superconducting transition broadens significantly. Eventually, the system fails to reach a fully zero-resistance state, and the finite resistance at low temperatures becomes strongly current-dependent. Our results suggest that the high-pressure, high-Tc phase of iron chalcogenides is very fragile and sensitive to uniaxial effects of the pressure medium, cell design and sample thickness. This high-pressure region could be understood assuming a real-space phase separation caused by nearly concomitant electronic and structural instabilities. |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
English |
| ISSN: |
2397-4648 |
| Relation: |
info:eu-repo/semantics/altIdentifier/wos/001325689400002; info:eu-repo/semantics/altIdentifier/issn/2397-4648; https://publikationen.bibliothek.kit.edu/1000174600; https://publikationen.bibliothek.kit.edu/1000174600/154885987; https://doi.org/10.5445/IR/1000174600 |
| DOI: |
10.5445/IR/1000174600 |
| Availability: |
https://publikationen.bibliothek.kit.edu/1000174600; https://publikationen.bibliothek.kit.edu/1000174600/154885987; https://doi.org/10.5445/IR/1000174600 |
| Rights: |
https://creativecommons.org/licenses/by/4.0/deed.de ; info:eu-repo/semantics/openAccess |
| Accession Number: |
edsbas.74E29C71 |
| Database: |
BASE |