Superconductivity of Y5Rh6Sn18; Coexistence of the high temperature thermal lattice relaxation process and superconductivity
| Autor: | Marcin Fijałkowski, Andrzej Ślebarski, Paweł Zajdel, J. Deniszczyk, Maciej M. Maśka |
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| Rok vydání: | 2020 |
| Předmět: |
Superconductivity
Materials science Condensed matter physics Mechanical Engineering Fermi level Metals and Alloys Ab initio 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Heat capacity 0104 chemical sciences Tetragonal crystal system symbols.namesake Mechanics of Materials Condensed Matter::Superconductivity Materials Chemistry symbols Density of states 0210 nano-technology Electronic band structure Critical field |
| Zdroj: | Journal of Alloys and Compounds. 819:152959 |
| ISSN: | 0925-8388 |
| Popis: | The heat capacity, magnetic, and electrical transport properties of skutterudite-related Y5Rh6Sn18 compound indicate intriguing coexistence of the high temperature thermal lattice relaxation process at temperatures higher than 350 K and superconductivity below the superconducting transition temperature T c = 3.08 K. Y5Rh6Sn18, having a cage-like structure crystallises in tetragonal structure with the space group I 4 1 / a c d . The gap structure of this compound is found not to be characteristic of conventional BCS type superconductors. Anomalous behaviour observed in the electronic specific heat C ( T ) / T and the upper critical field H c 2 ( T ) data may suggest the presence of two superconducting gaps in this compound. The ab initio band structure calculations showed a significant contribution of s and p Sn states as well as Rh and Y d-electron states to the total density of states near the Fermi level, which supports the multi-band superconductivity of this compound. Several electronic quantities and parameters characterising the superconducting and normal state of Y5Rh6Sn18 are calculated within the Ginzburg-Landau-Abrikosov-Gorkov theory. The data reveals dirty limit superconductivity in Y5Rh6Sn18 superconductor of type-II. |
| Databáze: | OpenAIRE |
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