Superconductor–Insulator Transition in NbTiN Films

M. V. Burdastyh, S. V. Postolova, T. I. Baturina, T. Proslier, V. M. Vinokur, A. Yu Mironov

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Experimental results indicating a direct disorder-induced superconductor–insulator transition in NbTiN thin films have been reported. It has been shown that an increase in the resistance per square in the normal state is accompanied by the suppression of the critical temperature of the superconducting transition Tc according to the fermion mechanism of suppression of superconductivity by disorder. At the same time, the temperature of the Berezinskii–Kosterlitz–Thouless transition is completely suppressed at a nonzero critical temperature and, then, the ground state changes to insulating, which is characteristic of the boson model of suppression of superconductivity by disorder. It has been shown that the temperature dependences of the resistance of insulating films follow the Arrhenius activation law.

Original languageEnglish
Pages (from-to)749-753
Number of pages5
JournalJETP Letters
Volume106
Issue number11
DOIs
Publication statusPublished - 1 Dec 2017

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