Specific Heat and Upper Critical Field of Sc5Ir4Si10 Superconductor

TL;DR

This study investigates the specific heat and upper critical field of the superconductor Sc5Ir4Si10, revealing its anisotropic s-wave nature and weakly one-dimensional Fermi surface through detailed experimental analysis.

Contribution

It provides the first detailed analysis of the gap structure and Fermi surface anisotropy of Sc5Ir4Si10 using specific heat and critical field measurements.

Findings

Sc5Ir4Si10 is an anisotropic s-wave superconductor.

Gap anisotropy is approximately 0.53.

Upper critical field suggests a weakly one-dimensional Fermi surface.

Abstract

Temperature and magnetic field dependent specific heat of textured Sc5Ir4Si10 superconductor was investigated in detail. Based on the fitting of zero-field electronic specific heat by different gap structures as well as the discussion on field-induced specific heat coefficient, Sc5Ir4Si10 is proved to be an anisotropic s-wave superconductor with a gap anisotropy of 0.53. The anisotropy of upper critical field suggests the weakly one-dimensional Fermi surface, and the value is consistent with the gap anisotropy result obtained from the specific heat data.