Strain-tuning emergent phases in FeTe between (π,0) and (π,π) order

ORAL

Abstract

Iron telluride, the non-superconducting parent compound of the Fe chalcogenide materials, exhibits a peculiar (π, 0) magnetic order not seen in other iron-based superconductors, which show (π,π) magnetic order. Theoretical predictions indicate that other magnetic phases can be stabilized in Fe1+xTe through tuning of the coupling strength between magnetic moments at next-nearest neighbor Fe sites.
Using low temperature scanning tunneling microscopy of strained samples, we have studied, at the atomic scale, the impact of small lattice distortions on the magnetic order of Fe1+xTe (x~0.06). Straining the material along the [110] direction, we have observed a new ordered phase that is characterized by a (π, π) order. I will discuss the origin of this new phase, and show measurements of its electronic and magnetic properties.

–

Presenters

  • Chi Ming Yim

    • School of Physics and Astronomy, University of St Andrews

Authors

  • Chi Ming Yim

    • School of Physics and Astronomy, University of St Andrews

  • Soumendra Panja

    • School of Physics and Astronomy, University of St Andrews
    • SUPA,School of Physics and Astronomy, University of St Andrews,, North Haugh, St Andrews, Fife KY16 9SS, United Kingdom

  • Christopher Trainer

    • School of Physics and Astronomy, University of St Andrews
    • SUPA,School of Physics and Astronomy, University of St Andrews,, North Haugh, St Andrews, Fife KY16 9SS, United Kingdom

  • Craig Topping

    • School of Physics and Astronomy, University of St Andrews
    • SUPA,School of Physics and Astronomy, University of St Andrews,, North Haugh, St Andrews, Fife KY16 9SS, United Kingdom

  • Christoph Heil

    • Graz Univ of Technology
    • Institute of Theoretical and Computational Physics, Graz University of Technology
    • Physics, Graz University of Technology

  • Vladimir Tsurkan

    • University of Augsburg
    • Center for Electronic Correlations and Magnetism, University of Augsburg
    • Center for Electronic Correlations and Magnetism, Experimental Physics V, University of Augsburg, D-86159 Augsburg, Germany

  • Alois Loidl

    • University of Augsburg
    • Center for Electronic Correlations and Magnetism, University of Augsburg
    • Center for Electronic Correlations and Magnetism, Experimental Physics V, University of Augsburg, D-86159 Augsburg, Germany

  • Andreas Rost

    • School of Physics and Astronomy, University of St Andrews
    • Univ of St Andrews
    • SUPA,School of Physics and Astronomy, University of St Andrews,, North Haugh, St Andrews, Fife KY16 9SS, United Kingdom

  • Peter Wahl

    • Univ of St Andrews
    • School of Physics and Astronomy, University of St Andrews
    • SUPA,School of Physics and Astronomy, University of St Andrews,, North Haugh, St Andrews, Fife KY16 9SS, United Kingdom