Observation of a c-axis collapse in superconducting FeTeO$_{\mathrm{x}}$ films below T$_{\mathrm{c}}$

ORAL

Abstract

We compared the temperature dependent crystal structure of superconducting FeTeO$_{\mathrm{x}}$ films and non superconducting Fe$_{1.02}$Te single crystals. The primary difference between the two is that the superconducting FeTeO$_{\mathrm{x}}$ films show a collapse of the c-axis below the superconducting transition temperature 13K. No such transition occurs in the single crystal. The room temperature structures of the two are similar and both show a tetragonal to monoclinic transition near 60K. Preliminary neutron diffraction studies indicate a suppression in antiferromagnetic order below T$_{\mathrm{c}}$ on superconducting FeTeO$_{\mathrm{x}}$ thin films.

*Supported by DOE through contact DE-FG02-00ER45801.

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Authors

  • Lahiru Narangammana

    • University of Connecticut, Storrs

  • Xuerong Liu

    • Brookhaven National Laboratory, Upton, NY
    • 1) Brookhaven National Laboratory; 2) Institute of Physics, Chinese Academy of Sciences

  • Yuefeng Nie

    • Cornell University, Ithaca, NY
    • Cornell University

  • J.I. Budnick

    • University of Connecticut, Storrs, CT
    • University of Connecticut

  • Christof Niedermayer

    • Paul Scherrrer Institut Villigen, PSI, Switzerland

  • John Hill

    • Brookhaven National Laboratory, Upton, NY

  • Genda Gu

    • Brookhaven National Laboratory
    • CMP\&MS Department, Brookhaven National Laboratory
    • Condensed Matter Physics \& Materials Science Department, Brookhaven National Laboratory
    • Brookhaven National Laboratory, Upton, NY
    • Brookhaven National Laboratory, Condensed Matter Physics \& Materials Science Department, NY 11973
    • Brookheaven National Laboratory

  • B.O. Wells

    • University of Connecticut, Storrs, CT
    • University of Connecticut