| Autor: |
Meng Li, N R Lee-Hone, Shun Chi, Ruixing Liang, W N Hardy, D A Bonn, E Girt, D M Broun |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Předmět: |
|
| Zdroj: |
New Journal of Physics, Vol 18, Iss 8, p 082001 (2016) |
| Druh dokumentu: |
article |
| ISSN: |
1367-2630 |
| DOI: |
10.1088/1367-2630/18/8/082001 |
| Popis: |
FeSe is an iron-based superconductor of immense current interest due to the large enhancements of T _c that occur when it is pressurised or grown as a single layer on an insulating substrate. Here we report precision measurements of its superconducting electrodynamics, at frequencies of 202 and 658 MHz and at temperatures down to 0.1 K. The quasiparticle conductivity reveals a rapid collapse in scattering on entering the superconducting state that is strongly reminiscent of unconventional superconductors such as cuprates, organics and the heavy fermion material CeCoIn _5 . At the lowest temperatures the quasiparticle mean free path exceeds 50 μ m, a record for a compound superconductor. From the superfluid response we confirm the importance of multiband superconductivity and reveal strong evidence for a non-zero energy-gap minimum. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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