Superconducting gap symmetry of the BiS$_2$-based superconductor LaO$_{0.5}$F$_{0.5}$BiSSe elucidated through specific heat measurement

Naoki Kase; Yusuke Terui; Tomohito Nakano; Naoya Takeda

doi:10.1103/PhysRevB.96.214506

paper

Superconducting gap symmetry of the BiS $_{2}$ -based superconductor LaO $_{0.5}$ F $_{0.5}$ BiSSe elucidated through specific heat measurement

arXiv:1709.05992 · doi:10.1103/PhysRevB.96.214506

Abstract

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, $Δ C_{e} / γ T_{c}$ and 2 $Δ$ (0)/ $k_{B} T_{c}$ 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 $C_{e} (T, H)$ 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.

5 pages, 4 figures

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Pressure tuning of localization and superconductivity in LaOPbBiS $_{3}$ and La $_{2}$ O $_{2}$ Bi $_{3}$ AgS $_{6}$

Superconducting gap symmetry of the BiS2​-based superconductor LaO0.5​F0.5​BiSSe elucidated through specific heat measurement

Abstract

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Cited by in corpus (1)

Superconducting gap symmetry of the BiS $_{2}$ -based superconductor LaO $_{0.5}$ F $_{0.5}$ BiSSe elucidated through specific heat measurement