Szczegóły publikacji
Opis bibliograficzny
Pressure effects on the electronic structure and superconductivity of $(TaNb)_{0.67}(HfZrTi)_{0.33}$ high entropy alloy / K. JASIEWICZ, B. WIENDLOCHA, K. Górnicka, K. Gofryk, M. Gazda, T. Klimczuk, J. TOBOŁA // Physical Review . B ; ISSN 2469-9950. — Tytuł poprz.: Physical Review B, Condensed Matter and Materials Physics ; ISSN: 1098-0121. — 2019 — vol. 100 iss. 18 art. no. 184503, s. 184503-1–184503-13. — Bibliogr. s. 184503-11–184503-13. — Publikacja dostępna online od: 2019-11-04
Autorzy (7)
- AGHJasiewicz Kinga
- AGHWiendlocha Bartłomiej
- Górnicka Karolina
- Gofryk K.
- Gazda Maria
- Klimczuk Tomasz
- AGHToboła Janusz Stefan
Dane bibliometryczne
| ID BaDAP | 126040 |
|---|---|
| Data dodania do BaDAP | 2020-01-13 |
| Tekst źródłowy | URL |
| DOI | 10.1103/PhysRevB.100.184503 |
| Rok publikacji | 2019 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Physical Review, B |
Abstract
Effects of pressure on the electronic structure, electron-phonon interaction, and superconductivity of the high entropy alloy (TaNb)(0.67)(HfZrTi)(0.33) are studied in the pressure range 0-100 GPa. The electronic structure is calculated using the Korringa-Kohn-Rostoker method with the coherent potential approximation. Effects of pressure on the lattice dynamics are simulated using the Debye-Gruneisen model and the Gruneisen parameter at ambient conditions. In addition, the Debye temperature and Sommerfeld electronic heat capacity coefficient were experimentally determined. The electron-phonon coupling parameter lambda is calculated using the McMillan-Hopfield parameters and computed within the rigid muffin-tin approximation. We find that the system undergoes the Lifshitz transition, as one of the bands crosses the Fermi level at elevated pressures. The electron-phonon coupling parameter lambda decreases above 10 GPa. The calculated superconducting T-c increases up to 40-50 GPa and, later, is stabilized at the larger value than for the ambient conditions, in agreement with the experimental findings. Our results show that the experimentally observed evolution of T-c with pressure in (TaNb)(0.67)(HfZrTi)(0.33) can be well explained by the classical electron-phonon mechanism.
