| Texto completo | |
| Autor(es): |
Panda, K.
;
Bhattacharyya, A.
;
Ferreira, P. N.
;
Mondal, Rajib
;
Thamizhavel, A.
;
Adroja, D. T.
;
Heil, C.
;
Eleno, L. T. F.
;
Hillier, A. D.
Número total de Autores: 9
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW B; v. 109, n. 22, p. 10-pg., 2024-06-25. |
| Resumo | |
In this study, we present a thorough investigation into the superconducting state of the ruthenium-based ternary equiatomic compound ScRuSi. Our analysis combines experimental techniques, including muon spin rotation/relaxation (mu SR) and low-temperature resistivity measurements, with theoretical insights derived from first-principles calculations. The low-temperature resistivity measurements reveal a distinct superconducting phase transition in the orthorhombic structure of ScRuSi at a critical temperature (TC) of 2.5 K. Further, the TF-mu SR analysis yields a gap-to-critical-temperature ratio of 2 Delta/kBTC = 2.71, a value consistent with results obtained from previous heat capacity measurements. The temperature dependence of the superconducting normalized depolarization rate is fully described by the isotropic s-wave gap model. Additionally, zero-field mu SR measurements indicate that the relaxation rate remains nearly identical below and above TC. This observation strongly suggests the preservation of time-reversal symmetry within the superconducting state. By employing the McMillan-Allen-Dynes equation, we calculate a TC of 2.11 K from first-principles calculations within the density functional theory framework. This calculated value aligns closely with the experimentally determined critical temperature. The coupling between the low-frequency phonon modes and the transition metal d-orbital states play an important role in governing the superconducting pairing in ScRuSi. The combination of experimental and theoretical approaches provides a comprehensive microscopic understanding of the superconducting nature of ScRuSi, offering insights into its critical temperature, pairing symmetry, and the underlying electron-phonon coupling mechanism. (AU) | |
| Processo FAPESP: | 20/08258-0 - Estudo ab initio de sistemas supercondutores e topológicos |
| Beneficiário: | Pedro Nunes Ferreira |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 21/13441-1 - Algoritmos evolutivos ab initio na descoberta de novas fases em sistemas de teluretos de metais de transição sob pressão |
| Beneficiário: | Pedro Nunes Ferreira |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado |