ARPES study of FeTe single crystal and FeTeO$_{x}$ films

ORAL

Abstract

We have performed an ARPES investigation of FeTe single crystals, films, as well as the novel superconducting film FeTeOx. Our results from the single crystals reflect the previously reported Fermi surface pocket around the X-point [($\pi $,0)], possibly connected to a spin-density wave (SDW) order [Y. Xia, PRL 103, 037002 (2009)] . Unlike this previous report, our results also reveal the presence of an energy gap which would be expected from the SDW order. The temperature dependence shows that the gap closes in the rough vicinity of the magnetic transition temperature, supporting it's interpretation as reflecting the SDW state. We were able to produce an ARPES quality surface by cleaving films of FeTe and FeTeO$_{x}$, with the FeTe films showing similar features as the bulk.

*Funded by the DOE-BES through contract \# DE-FG02-00ER45801.

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Authors

  • Yuefeng Nie

    • Department of Physics, University of Connecticut, Storrs, CT 06269

  • Martin Mansson

    • Laboratory for Neutron Scattering, ETH Z\"aurich and Paul Scherrer Institute, PSI, Switzerland

  • Yasmine Sassa

    • Laboratory for Neutron Scattering, ETH Z\"Aurich and Paul Scherrer Institute, PSI, Switzerland

  • Christof Niedermayer

    • Laboratory for Neutron Scattering, ETH Z\"aurich and Paul Scherrer Institute, PSI, Switzerland
    • Paul Scherrer Institut

  • Genda Gu

    • Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory
    • Condensed Matter Physics and Materials Science, Brookhaven National Laboratory (BNL), Upton, NY 11973
    • Brookhaven National Laboratory
    • Brookhaven
    • Brookhaven National Lab

  • J. I. Budnick

    • Department of Physics, University of Connecticut, Storrs, CT 06269
    • University of Connecticut, 2152, Hillside road, Storrs
    • University of Connecticut, 2152, Hillside road, Storrs CT-06269

  • B.O. Wells

    • Department of Physics, University of Connecticut, Storrs, CT 06269
    • University of Connecticut, 2152, Hillside road, Storrs
    • University of Connecticut, 2152, Hillside road, Storrs CT-06269