Bulk evidence of anisotropic s-wave pairing with no sign change in the kagome superconductor CsV3Sb5 - Laboratoire des Solides Irradiés (LSI) Accéder directement au contenu
Article Dans Une Revue Nature Communications Année : 2023

Bulk evidence of anisotropic s-wave pairing with no sign change in the kagome superconductor CsV3Sb5

Résumé

The recently discovered kagome superconductors AV3Sb5 (A = K, Rb, Cs) exhibit unusual charge-density-wave (CDW) orders with time-reversal and rotational symmetry breaking. One of the most crucial unresolved issues is identifying the symmetry of the superconductivity that develops inside the CDW phase. Theory predicts a variety of unconventional superconducting symmetries with sign-changing and chiral order parameters. Experimentally, however, superconducting phase information in AV3Sb5 is still lacking. Here we report the impurity effects in CsV3Sb5 using electron irradiation as a phase-sensitive probe of superconductivity. Our magnetic penetration depth measurements reveal that with increasing impurities, an anisotropic fully-gapped state changes to an isotropic full-gap state without passing through a nodal state. Furthermore, transport measurements under pressure show that the double superconducting dome in the pressure-temperature phase diagram survives against sufficient impurities. These results support that CsV3Sb5 is a non-chiral, anisotropic s-wave superconductor with no sign change both at ambient and under pressure.
Fichier principal
Vignette du fichier
Roppongi-2023-Bulk-evidence-of-anisotropic-s-wave.pdf (1.51 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-04034811 , version 1 (17-03-2023)

Identifiants

Citer

M. Roppongi, K. Ishihara, Y. Tanaka, K Ogawa, K Okada, et al.. Bulk evidence of anisotropic s-wave pairing with no sign change in the kagome superconductor CsV3Sb5. Nature Communications, 2023, 14, pp.667. ⟨10.1038/s41467-023-36273-x⟩. ⟨hal-04034811⟩
26 Consultations
27 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More