Absence of superconductivity in topological metal ScInAu$_2$

J. M. DeStefano; G. P. Marciaga; J. B. Flahavan; U. S. Shah; T. A. Elmslie; M. W. Meisel; J. J. Hamlin

doi:10.1016/j.physc.2021.1353928

paper

Absence of superconductivity in topological metal ScInAu $_{2}$

arXiv:2012.06501 · doi:10.1016/j.physc.2021.1353928

Abstract

The Heusler compound ScInAu $_{2}$ was previously reported to have a superconducting ground state with a critical temperature of 3.0 K. Recent high throughput calculations have also predicted that the material harbors a topologically non-trivial band structure similar to that reported for beta-PdBi $_{2}$ . In an effort to explore the interplay between the superconducting and topological properties properties, electrical resistance, magnetization, and x-ray diffraction measurements were performed on polycrystalline ScInAu $_{2}$ . The data reveal that high-quality polycrystalline samples lack the super-conducting transition present samples that have not been annealed. These results indicate the earlier reported superconductivity is non-intrinsic. Several compounds in the Au-In-Sc ternary phase space (ScAu $_{2}$ , ScIn $_{3}$ , and ScInAu $_{2}$ ) were explored in an attempt to identify the secondary phase responsible for the non-intrinsic superconductivity. The results suggest that elemental In is responsible for the reported superconductivity in ScInAu $_{2}$ .

arXiv comment5 pages, 4 figures

Absence of superconductivity in topological metal ScInAu2​

Abstract

References in corpus (12)

Absence of superconductivity in topological metal ScInAu $_{2}$