Comparative study of the effects of electron irradiation and natural disorder in single crystals of SrFe 2 (As 1−x P x ) 2 superconductor (x = 0.35)

Abstract : The London penetration depth λ(T) was measured in single crystals of a SrFe 2 (As 1−x P x) 2 (x = 0.35) iron-based superconductor. The influence of disorder on the transition temperature T c and on λ(T) was investigated. The effects of scattering controlled by the annealing of as-grown crystals was compared with the effects of artificial disorder introduced by 2.5 MeV electron irradiation. The low-temperature behavior of λ(T) can be described by a power-law function λ(T) = AT n , with the exponent n close to one in pristine annealed samples, as expected for a superconducting gap with line nodes. Upon electron irradiation with a dose of 1.2 × 10 19 e/cm 2 , the exponent n increases rapidly, exceeding a dirty limit value of n = 2, implying that the nodes in the superconducting gap are accidental and can be lifted by the disorder. The variation of the exponent n with T c is much stronger in the irradiated crystals compared to the crystals in which disorder was controlled by the annealing of the growth defects. We discuss the results in terms of different influence of different types of disorder on intraband and interband scattering.
Type de document :
Article dans une revue
Physical Review B : Condensed matter and materials physics, American Physical Society, 2014, 90, pp.5. 〈10.1103/PhysRevB.90.020508〉
Liste complète des métadonnées

Littérature citée [23 références]  Voir  Masquer  Télécharger

https://hal-polytechnique.archives-ouvertes.fr/hal-01074701
Contributeur : Marcin Konczykowski <>
Soumis le : vendredi 12 décembre 2014 - 23:13:12
Dernière modification le : jeudi 10 mai 2018 - 02:00:29
Document(s) archivé(s) le : vendredi 14 avril 2017 - 16:05:24

Fichier

PhysRevB.90.020508.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Collections

Citation

C. P. Strehlow, M. Konczykowski, J. A. Murphy, S. Teknowijoyo, K. Cho, et al.. Comparative study of the effects of electron irradiation and natural disorder in single crystals of SrFe 2 (As 1−x P x ) 2 superconductor (x = 0.35). Physical Review B : Condensed matter and materials physics, American Physical Society, 2014, 90, pp.5. 〈10.1103/PhysRevB.90.020508〉. 〈hal-01074701〉

Partager

Métriques

Consultations de la notice

547

Téléchargements de fichiers

187