Superconducting gap symmetry of the BiS$_2$-based superconductor LaO$_{0.5}$F$_{0.5}$BiSSe elucidated through specific heat measurement
| Autor: | Kase, Naoki, Terui, Yusuke, Nakano, Tomohito, Takeda, Naoya |
|---|---|
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 96, 214506 (2017) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.96.214506 |
| Popis: | In this study, the superconducting gap symmetry of LaO$_{0.5}$F$_{0.5}$BiSSe is elucidated through specific heat measurements with one single crystal of LaO$_{0.5}$F$_{0.5}$BiSSe. A clear jump is observed at 3.95 K in LaO$_{0.5}$F$_{0.5}$BiSSe, suggesting bulk superconductivity. From specific heat measurements, $\Delta C_\mathrm{e}/\gamma T_\mathrm{c}$ and 2$\Delta$(0)/$k_\mathrm{B}T_\mathrm{c}$ are obtained as 2.31 and 4.5. These values indicate strong electron-phonon coupling superconductivity. The temperature ($T$) and magnetic-field ($H$) dependence of the electronic specific heat $C_\mathrm{e}(T, H)$ suggests that superconductivity is fully gapped. Our handmade system successfully elucidates superconducting gap symmetry of the BiS$_2$-based compound with a small single crystal. Comment: 5 pages, 4 figures |
| Databáze: | arXiv |
| Externí odkaz: |
|