In-plane Resistivity Anisotropy in Mechanically De- twinned Single Crystals FeSe

ORAL

Abstract

The in-plane resistivity anisotropy was studied in stress-detwinned vapor transport grown single crystals of FeSe, which exhibit the tetragonal-orthorhombic structural transition temperature at $T_s \sim $ 90 K in unstrained samples, but no long-range magnetic order. Direct transport and elastoresistivity measurements show a significant in-plane resistivity anisotropy above $T_s$ induced by a very moderate mechanical stress. This anisotropy peaks slightly below $T_s$ and decreases to nearly zero on cooling to base temperature, while the degree of orthorhombic distortion grows monotonically before saturating at low temperatures. We explain the non-monotonic temperature dependence of the resistivity anisotropy as a result of the inelastic scattering of electrons by anisotropic spin fluctuations. Experimental work was supported by the U.S. DOE/OS/MSED and was performed at the Ames Laboratory, Iowa State University under contract DE-AC02-07CH11358. M.S. acknowledges the support from the Humboldt Foundation. R.M.F. is supported by the U.S. DOE, Office of Science, Basic Energy Sciences, under Award No. DE-SC0012336.

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Authors

  • Erik Timmons

    • The Ames Laboratory and Iowa State University

  • Makariy A. Tanatar

    • The Ames Laboratory and Iowa State University
    • Ames Laboratory and Iowa State University
    • Iowa State University/ Ames Laboratory

  • Anna B\"{o}hmer

    • The Ames Laboratory
    • Ames Laboratory and Iowa State University
    • Ames Laboratory
    • Ames Laboratory, U.S. Department of Energy, Iowa State University, Ames, Iowa 50011

  • Gil DRACHUCK

    • Iowa State University

  • Valentin Taufour

    • The Ames Laboratory and Iowa State University
    • Ames Lab., Dept. of Physics and Astronomy, Iowa State Univ.
    • Iowa State University/ Ames Laboratory
    • Ames Laboratory / Iowa State University, Ames, IA 50011, USA

  • Sergey Bud'ko

    • The Ames Laboratory and Iowa State University

  • Paul C. Canfield

    • The Ames Laboratory and Iowa State University
    • Ames Laboratory, U.S. DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
    • Ames Lab., Dept. of Physics and Astronomy, Iowa State Univ.
    • Iowa State University/ Ames Laboratory
    • Ames Laboratory, Dept. of Phys. and Astro, Iowa State Univ.
    • Ames Laboratory and Dept of Physics and Astronomy, Iowa State University

  • R Prozorov

    • The Ames Laboratory and Iowa State University
    • Ames Laboratory and Iowa State University, USA
    • Ames Laboratory and Iowa State University

  • Michael Schuett

    • University of Minnesota

  • Rafael Fernandes

    • University of Minnesota
    • School of Physics and Astronomy, University of Minnesota
    • Univ of Minn - Minneapolis