http://hdl.handle.net/20.500.12128/18020
Title: | Enhancing superconductivity of the nonmagnetic quasiskutterudites by atomic disorder |
Authors: | Ślebarski, Andrzej Maśka, Maciej M. |
Keywords: | skutterudite-related superconductors; superconductivity; BCS theory; atomic disorder |
Issue Date: | 2020 |
Citation: | "Materials" (2020), iss. 24, art. no. 5830, s. 1-17 |
Abstract: | We investigated the effect of enhancement of superconducting transition temperature Tc by nonmagnetic atom disorder in the series of filled skutterudite-related compounds (La3M4Sn13, Ca3Rh4Sn13, Y5Rh6Sn18, Lu5Rh6Sn18; M = Co, Ru, Rh), where the atomic disorder is generated by various defects or doping. We have shown that the disorder on the coherence length scale x in these nonmagnetic quasiskutterudite superconductors additionally generates a non-homogeneous, high-temperature superconducting phase with T? c > Tc (dilute disorder scenario), while the strong fluctuations of stoichiometry due to increasing doping can rapidly increase the superconducting transition temperature of the sample even to the value of T? c 2Tc (dense disorder leading to strong inhomogeneity). This phenomenon seems to be characteristic of high-temperature superconductors and superconducting heavy fermions, and recently have received renewed attention. We experimentally documented the stronger lattice stiffening of the inhomogeneous superconducting phase T? c in respect to the bulk Tc one and proposed a model that explains the T? c > Tc behavior in the series of nonmagnetic skutterudite-related compounds. |
URI: | http://hdl.handle.net/20.500.12128/18020 |
DOI: | 10.3390/ma13245830 |
ISSN: | 1996-1944 |
Appears in Collections: | Artykuły (WNŚiT) |
File | Description | Size | Format | |
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Slebarski_Maska_enhancing_superconductivity_of_the_nonmagnetic.pdf | 7,38 MB | Adobe PDF | View/Open |
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