Two-gap superconductivity in the noncentrosymmetric La$_3$Se$_4$ compound Article Swipe

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F. Košuth , N. Potomová , Z. Pribulová , J. Kačmarčík , Moumita Naskar , D. S. Inosov , Soumen Ash , Ashok K. Ganguli , J. Šoltýs , V. Cambel , P. Szabó , P. Samuely ·

YOU? · · 2024 · Open Access · · DOI: https://doi.org/10.48550/arxiv.2411.16399

Point-contact Andreev reflection spectroscopy at low temperatures and high magnetic fields has been performed on a noncentrosymmetric La$_3$Se$_4$ superconductor with a critical temperature $T_c$ = 8 K. Two superconducting energy gaps $Δ_1$ and $Δ_2$ with $2Δ_{1}/k_{B} T_{c}$ ~ 5.8 and $2Δ_{2}/k_{B} T_{c}$ ~ 2.3, are directly observed in some of the spectra. The temperature and magnetic field effects help to resolve a two-gap structure even on the most frequent spectra where at low temperatures only a single gap is apparent, reflected in a pair of maxima around the zero bias. Two-gap superconductivity consistently with the point contact Andreev reflection spectroscopy is also supported by the heat capacity and the Hall probe magnetization measurements.

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Superconductivity

Condensed Matter Physics

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Type: preprint
Language: en
Landing Page: https://doi.org/10.48550/arxiv.2411.16399
OA Status: green
Related Works: 10
OpenAlex ID: https://openalex.org/W4404985870

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DOI: https://doi.org/10.48550/arxiv.2411.16399

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Title: Two-gap superconductivity in the noncentrosymmetric La$_3$Se$_4$ compound

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Type: preprint

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Language: en

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Publication year: 2024

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Publication date: 2024-11-25

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Authors: F. Košuth, N. Potomová, Z. Pribulová, J. Kačmarčík, Moumita Naskar, D. S. Inosov, Soumen Ash, Ashok K. Ganguli, J. Šoltýs, V. Cambel, P. Szabó, P. Samuely

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Landing page: https://doi.org/10.48550/arxiv.2411.16399

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Concepts: Superconductivity, Condensed matter physics, Physics

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Cited by: 0

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Related works (count): 10

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