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