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) - École polytechnique Access content directly
Journal Articles Physical Review B: Condensed Matter and Materials Physics (1998-2015) Year : 2014

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.
Fichier principal
Vignette du fichier
PhysRevB.90.020508.pdf (358.26 Ko) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-01074701 , version 1 (12-12-2014)

Identifiers

Cite

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 (1998-2015), 2014, 90, pp.5. ⟨10.1103/PhysRevB.90.020508⟩. ⟨hal-01074701⟩
479 View
229 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More