Bulk superconductivity in Bi4O4S3 revealed by specific heat measurement
Hiroshi Takatsu, Yoshikazu Mizuguchi, Hiroki Izawa, Osuke Miura, and, Hiroaki Kadowaki
TL;DR
This study confirms bulk superconductivity in Bi4O4S3 through specific heat measurements, aligning with resistivity and susceptibility data, and establishing its intrinsic superconducting nature.
Contribution
First direct thermodynamic evidence of bulk superconductivity in Bi4O4S3 using specific heat measurements.
Findings
Superconducting transition at Tc = 4.4 K confirmed by specific heat anomaly.
Superconductivity in Bi4O4S3 is bulk in nature.
Transition temperature consistent across different measurement techniques.
Abstract
Specific heat experiments on a well-characterized polycrystalline sample of the BiS2 based superconductor Bi4O4S3 revealed that it shows a crear specific heat anomaly at about Tc = 4.4 K, consistent with Tc from the resistivity and dc susceptibility. This observation indicates the superconductivity of Bi4O4S3 to be bulk in nature.
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