Unconventional isotope effect on transition temperature in BiS2-based superconductor Bi4O4S3

Abstract

We report the sulfur isotope effect on transition temperature in a BiS2-based superconductor Bi4O4S3. Polycrystalline samples of Bi4O4S3 were prepared using 32S and 34S isotope chemicals. From magnetization analyses, the isotope exponent (aS) was estimated as -0.1 < aS < 0.1. Although the Tc estimated from electrical resistivity was scattered as compared to those estimated from the magnetization, we observed no clear correlation between Tc and the isotope mass. The present results suggest that unconventional paring states are essential in Bi4O4S3.

10 pages, 4 figures

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Cited by in corpus (7)

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• Structural phase diagram of LaO1-xFxBiSSe: suppression of the structural phase transition by partial F substitutions
• Lattice Anharmonicity in BiS2-Based Layered Superconductor RE(O,F)BiS2 (RE = La, Ce, Pr, Nd)
• High pressure effects on La(O,F)BiS${}_2$ single crystal using diamond anvil cell with dual-probe diamond electrodes
• High-pressure effects on superconducting properties and crystal structure of Bi-based layered superconductor La2O2Bi3Ag0.6Sn0.4S6
• Investigation of in-plane anisotropy of c-axis magnetoresistance for BiCh2-based layered superconductor NdO0.7F0.3BiS2
• Pb Substitution Effects on Lattice and Electronic System of the BiS2-based Superconductors La(O F)BiS2