Quantum oscillations reveal the low temperature Fermi surfaces of FeSe1−xSx tuned by chemical and applied pressure across the nematic phase transition

ORAL

Abstract

We present the evolution of the Fermi surfaces and electronic interactions across the nematic phase transition in single crystals of FeSe1−xSx using Shubnikov-de Haas oscillations in high magnetic fields up to 45 tesla in the low temperature regime. We will compare the effect of the chemical and applied hydrostatic pressure on the low-energy electronic structure and discuss the role of Lifshitz transitions and the changes in electronic correlations across the nematic phase transition. Our results can shed light on the interplay between competing electronic orders in FeSe1−xSx which can be finely tuned by combing chemical and applied pressure.

*This work was mainly supported by EPSRC (EP/I004475/1, EP/I017836/1,EP/M020517/1). A portion of this work was performed at the National High Magnetic Field Laboratory, which is supported by National Science Foundation Cooperative Agreement No. DMR-1157490 and the State of Florida. A.I.C. acknowledges an

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Presenters

  • Amalia Coldea

    • Physics, University of Oxford

Authors

  • Amalia Coldea

    • Physics, University of Oxford

  • Pascal Reiss

    • Physics, University of Oxford

  • David Graf

    • NHMFL Tallahassee
    • NHMFL
    • National High Magnetic Field Lab
    • National High Magnetic Field Laboratory
    • National High Magnetic Field Laboratory/Florida State University
    • Natl High Magnetic Field Lab
    • NHMFL at Florida State University
    • Florida State University, National High Magnetic Field Laboratory
    • Florida State University
    • Condensed Matter Science, NHMFL

  • Amir Haghighirad

    • Institute for Solid-State Physics, Karlsruhe Institute of Technology
    • Institute for Solid-State Physics, Karlsruher Institute of Technology
    • Institute for Solid-State Physics (IFP), Karlsruhe Institute of Technology