BHATTACHARYYA, A.; RODIÈRE, Pierre; VANEY, Jean-Baptiste; BISWAS, P.; HILLIER, A.; BOSIN, A.; BERNARDINI, F.; TENCÉ, Sophie; ADROJA, D.; CANO, Andrés

doi:10.1103/PhysRevB.101.224502

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BHATTACHARYYA, A.
Ramakrishna Vivekananda Mission University [Kolkata]

RODIÈRE, Pierre
Magnétisme et Supraconductivité [NEEL - MagSup]

VANEY, Jean-Baptiste
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Article de revue

Ce document a été publié dans

Physical Review B. 2020-06, vol. 101, n° 22, p. 224502

American Physical Society

Résumé en anglais

Unconventional superconductivity has recently been discovered in the iron-based superconducting silicide LaFeSiH. By using the complementary techniques of muon spin rotation, tunneling diode oscillator, and density-functional theory, we investigate the magnetic penetration depth and thereby the superconducting gap of this high-temperature superconductor. We find that the magnetic penetration depth displays a sub-T2 behavior in the low-temperature regime below Tc/3, which evidences a nodal structure of the gap (or a gap with very deep minima). Even if the topology of the computed Fermi surface is compatible with the s±-wave case with accidental nodes, its nesting and orbital-content features may eventually result in a d-wave state, which is more unusual for high-temperature superconductors of this class.< Réduire

DOI

http://dx.doi.org/10.1103/PhysRevB.101.224502

Project ANR

Novel As/Se-free Iron-based Superconductors

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Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026