Superconductivity of Ta 34 Nb 33 Hf 8 Zr 14 Ti 11 high entropy alloy from first principles calculations

The Korringa–Kohn–Rostoker method with the coherent potental approximation (KKR‐CPA) is applied to study the first superconducting high entropy alloy (HEA) Ta 34 Nb 33 Hf 8 Zr 14 Ti 11 (discovered in 2014 with T c = 7.3 K), focusing on estimations of the electron–phonon coupling constant λ . The ele...

Full description

Saved in:
Bibliographic Details
Published in:Physica status solidi. PSS-RRL. Rapid research letters 2016-05, Vol.10 (5), p.415-419
Main Authors: Jasiewicz, K., Wiendlocha, B., Korbeń, P., Kaprzyk, S., Tobola, J.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The Korringa–Kohn–Rostoker method with the coherent potental approximation (KKR‐CPA) is applied to study the first superconducting high entropy alloy (HEA) Ta 34 Nb 33 Hf 8 Zr 14 Ti 11 (discovered in 2014 with T c = 7.3 K), focusing on estimations of the electron–phonon coupling constant λ . The electronic part of λ 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 λ = 1.16 is close to the value determined from specific heat measurements, λ = 0.98, and suggests rather strong electron–phonon coupling in this material. (© 2016 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim)
ISSN:1862-6254
1862-6270
DOI:10.1002/pssr.201600056