Single-gap superconductivity in Mo(8)Ga(41)

In this paper, the potential existence of two-gap superconductivity in Mo(8)Ga(41) is addressed in detail by means of thermodynamic and spectroscopic measurements. A combination of highly sensitive bulk and surface probes, specifically ac-calorimetry and scanning tunneling spectroscopy (STS), are ut...

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Detalles Bibliográficos
Autores principales: Marcin, Miroslav, Kačmarčík, Jozef, Pribulová, Zuzana, Kopčík, Michal, Szabó, Pavol, Šofranko, Ondrej, Samuely, Tomáš, Vaňo, Viliam, Marcenat, Christophe, Verchenko, Valeriy Yu., Shevelkov, Andrei V., Samuely, Peter
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6753155/
https://www.ncbi.nlm.nih.gov/pubmed/31537828
http://dx.doi.org/10.1038/s41598-019-49846-y
Descripción
Sumario:In this paper, the potential existence of two-gap superconductivity in Mo(8)Ga(41) is addressed in detail by means of thermodynamic and spectroscopic measurements. A combination of highly sensitive bulk and surface probes, specifically ac-calorimetry and scanning tunneling spectroscopy (STS), are utilized on the same piece of crystal and reveal the presence of only one intrinsic gap in the system featuring strong electron-phonon coupling. Minute traces of additional superconducting phases detected by STS and also in the heat capacity measured in high magnetic fields on a high-quality and seemingly single-phase crystal might mimic the multigap superconductivity of Mo(8)Ga(41) suggested recently in several studies.

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