Superconductivity of Ta34Nb33Hf8Zr14Ti11 high entropy alloy from first principles calculations

Autor:	Jasiewicz, K., Wiendlocha, B., Korbeń, P., Kaprzyk, S., Tobola, J.
Rok vydání:	2016
Předmět:	Condensed Matter - Superconductivity Condensed Matter - Materials Science
Zdroj:	Phys. Status Solidi RRL 10, 415 (2016)
Druh dokumentu:	Working Paper
DOI:	10.1002/pssr.201600056
Popis:	The Korringa-Kohn-Rostoker method with the coherent potental approximation (KKR-CPA) is applied to study the first superconducting high entropy alloy (HEA) Ta34Nb33Hf8Zr14Ti11 (discovered in 2014 with Tc = 7.3 K), focusing on estimations of the electron-phonon coupling constant \lambda. Electronic part of \lambda has been calculated using the rigid muffin-tin approximation (RMTA), while the phonon part has been approximated using average atomic mass and experimental Debye temperature. The estimated \lambda = 1.16 is close to the value determined from specific heat measurements, \lambda = 0.98, and suggests rather strong electron-phonon coupling in this material. Comment: 5 pages, 4 figures, to be published in Physica Status Solidi Rapid Research Letters
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1603.07274 Zobrazit plný text záznamu View this record from Arxiv