Suppression of superconductivity and the magnetotransport behaviour in ultra-thin flakes of FeSe

ORAL

Abstract

The discovery of high temperature superconductivity in a monolayer of FeSe on SrTiO3 has ignited significant interest in understanding its two-dimensional superconductivity and the interfacial phenomena that determine its properties. To address these aspects, we examine the superconducting and electronic properties of exfoliated thin flakes of FeSe as a function of decreasing thickness, from bulk down towards 10 nm. We present a magnetotransport study in magnetic fields up to 38 T, which allows us to assess the changes in the multi-band electronic properties as a function of thickness. By reducing the thickness, the superconductivity of FeSe flakes is suppressed and the superconducting phase diagrams show significant changes in anisotropy.

–

Presenters

  • Liam Farrar

    Department of Physics, University of Bath

Authors

  • Liam Farrar

    Department of Physics, University of Bath

  • Matthew Bristow

    Department of Physics, University of Oxford

  • Amir Haghighirad

    Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany, Institute for Solid-State Physics, Karlsruhe Institute of Technology, Institute for Solid State Physics, Karlsruhe Institute of Technology

  • Alix McCollam

    High Field Magnet Laboratory (HFML-EMFL), Radboud University, 6525 ED Nijmegen, The Netherlands, High Field Magnet Laboratory (HFML-EMFL), Radboud University, Toernooiveld 7, 6525 ED, Nijmegen, The Netherlands, High Field Magnet Laboratory (HFML-EMFL), Radboud University

  • Simon Bending

    University of Bath, Department of Physics, University of Bath

  • Amalia Coldea

    Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, U.K, Department of Physics, University of Oxford