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.

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

LEO, ANTONIO;MARRA, PASQUALE;GRIMALDI, Gaia;CITRO, Roberta;PACE, Sandro;NIGRO, Angela
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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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11386/4661183
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