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Journal of Low Temperature Physics

, Volume 178, Issue 1–2, pp 118–127 | Cite as

Superconducting and Insulating Phases of Disordered FeSe Thin Films in a Magnetic Field

  • R. Schneider
  • A. G. Zaitsev
  • D. Fuchs
  • H. von Löhneysen
Article

Abstract

The temperature-dependent electronic transport on the superconducting and insulating sides of the superconductor-insulator transition in disordered quasi-two-dimensional textured FeSe thin films is reported. The transition is driven by a perpendicular magnetic field applied to a film with its thickness close to the critical thickness of the thickness-, i.e., disorder-induced transition. The resistance in the superconducting phase might be dominated by thermally assisted flux flow, and in the phase diagram a metallic phase might intervene between the superconducting and insulating state at very low temperatures. In the insulating phase, weak insulating behavior is observed that can be described by weak localization theory of bosons, thus supporting the bosonic description of the superconductor-insulator transition in FeSe thin films.

Keywords

Superconductors Magnetoresistance Flux flow Weak localization 

Abbreviations

SIT

Superconductor-insulator transition

2D

Two dimensional

B-SIT

Magnetic-field driven superconductor-insulator transition

TAFF

Thermally assisted flux flow

Notes

Acknowledgments

The authors would like to thank A. Beck and E.-P. Knaetsch for technical assistance.

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • R. Schneider
    • 1
  • A. G. Zaitsev
    • 1
  • D. Fuchs
    • 1
  • H. von Löhneysen
    • 1
    • 2
  1. 1.Institut für FestkörperphysikKarlsruher Institut für TechnologieKarlsruheGermany
  2. 2.Physikalisches InstitutKarlsruher Institut für TechnologieKarlsruheGermany

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