Competition between intrinsic and extrinsic effects in the quenching of the superconducting state in Fe(Se,Te) thin films

Antonio Leo, Pasquale Marra, Gaia Grimaldi, Roberta Citro, Shrikant Kawale, Emilio Bellingeri, Carlo Ferdeghini, Sandro Pace, and Angela Nigro
Phys. Rev. B 93, 054503 – Published 1 February 2016

Abstract

We report the first experimental observation of the quenching of the superconducting state in current-voltage characteristics of an iron-based superconductor, namely, in Fe(Se,Te) thin films. Based on available theoretical models, our analysis suggests the presence of an intrinsic flux-flow electronic instability along with non-negligible extrinsic thermal effects. The coexistence and competition of these two mechanisms classify the observed instability as halfway between those of low-temperature and of high-temperature superconductors, where thermal effects are, respectively, largely negligible or predominant.

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  • Received 23 October 2015

DOI:https://doi.org/10.1103/PhysRevB.93.054503

©2016 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
  1. Physical Systems
Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Antonio Leo1,2,*, Pasquale Marra2,1,†, Gaia Grimaldi2,1, Roberta Citro1,2, Shrikant Kawale3, Emilio Bellingeri3, Carlo Ferdeghini3, Sandro Pace1,2, and Angela Nigro1,2

  • 1Dipartimento di Fisica “E. R. Caianiello”, Università degli Studi di Salerno, 84084 Fisciano (Salerno), Italy
  • 2CNR-SPIN Salerno, 84084 Fisciano (Salerno), Italy
  • 3CNR-SPIN Genova, Corso Perrone 24, 16152 Genova, Italy

  • *antoleo@sa.infn.it
  • pasquale.marra@spin.cnr.it

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Issue

Vol. 93, Iss. 5 — 1 February 2016

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