Domain walls and boundaries on the Surface of BaFe2As2 (001)

ORAL

Abstract

Phase separation and domains of the same phase are integral building blocks of functionality in complex materials. We have used scanning tunneling microscopy/spectroscopy (STM/STS) to investigate the surface geometric and electronic structure of parent compound BaFe2As2 (001) of the iron-based superconductor. Here, we describe our observations of domains of the antiferromagnetic structure with zigzag boundaries, which are found in the p(1x1) As terminated metallic phase. Bias dependent STM measurements on these boundaries at 80K clearly show that the boundaries are mainly due to the electronic contribution in the local density of states.

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Authors

  • Xiaobo He

    Department of Physics \& Astronomy, Louisiana State University, Baton Rouge, LA, 70803

  • Guorong Li

    Department of Physics \& Astronomy, Louisiana State University, Baton Rouge, LA, 70803

  • Von Braun Nascimento

    Department of Physics \& Astronomy, Louisiana State University, Baton Rouge, LA, 70803, Dept of Physics and Astronomy, Louisiana State University

  • Jiandi Zhang

    Department of Physics \& Astronomy, Louisiana State University, Baton Rouge, LA, 70803, Louisiana State University, Baton Rouge, LA 70808

  • Rongying Jin

    Department of physics and Astronomy, Louisiana State University, Department of Physics \& Astronomy, Louisiana State University, Baton Rouge, LA, 70803, Department of Physics and Astronomy, Louisiana State University, Louisiana State University, Dept of Physics and Astronomy, Louisiana State University

  • E. Ward Plummer

    Department of physics and Astronomy, Louisiana State University, Louisiana State University, Department of Physics \& Astronomy, Louisiana State University, Baton Rouge, LA, 70803, Louisiana State University, Baton Rouge, LA 70808, Dept of Physics and Astronomy, Louisiana State University

  • Athena Sefat

    Oak Ridge National Laboratory, Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, Oak Ridge National Laboratory, Oak Ridge, Tennessee

  • Michael McGuire

    Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, Oak Ridge National Laboratory, Oak Ridge, Tennessee, Oak Ridge National Laboratory - MSTD, Oak Ridge National Laboratory

  • Brian Sales

    Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, ORNL, Oak Ridge National Laboratory, Oak Ridge, Tennessee, Oak Ridge National Laboratory, Oak Ridge National Laboratory - MSTD

  • David Mandrus

    Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, ORNL, Oak Ridge National Laboratory, Oak Ridge, Tennessee, Oak Ridge National Laboratory - MSTD, Oak Ridge National Laboratory