Absence of superconductivity in topological metal ScInAu2
| Autor: | James Hamlin, J. M. DeStefano, J.B. Flahavan, T.A. Elmslie, Mark W. Meisel, G.P. Marciaga, U. S. Shah |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Superconductivity
Materials science Energy Engineering and Power Technology 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Heusler compound Topology 01 natural sciences Electronic Optical and Magnetic Materials Metal Magnetization Electrical resistance and conductance Condensed Matter::Superconductivity visual_art 0103 physical sciences visual_art.visual_art_medium engineering Crystallite Electrical and Electronic Engineering 010306 general physics 0210 nano-technology Ground state Electronic band structure |
| Zdroj: | Physica C: Superconductivity and its Applications. 589:1353928 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/j.physc.2021.1353928 |
| Popis: | The Heusler compound S c I n A u 2 was previously reported to have a superconducting ground state with a critical temperature of 3.0K. Recent high throughput calculations have also predicted that the material harbors a topologically non-trivial band structure similar to that reported for β - P d B i 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 S c I n A u 2 . The data reveal that high-quality polycrystalline samples lack the superconducting 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 ( S c A u 2 , S c I n 3 , and S c 2 I n A u 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 S c I n A u 2 . |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect