Scanning tunneling microscopy and spectroscopy of BaNi<sub>2</sub>As<sub>2</sub> at 4.8K

ORAL

Abstract

Materials of the form AM2P2, with alkali or alkaline earth metal A, transition metal M, and pnictide P, have garnered interest of late due largely to their rich structural phase transitions and unusual electronic properties. We have performed low-temperature scanning tunneling microscopy topography and scanning tunneling spectroscopy (STS) of in-situ cleaved BaNi2As2, under ultra-high vacuum (UHV) conditions. A variety of features are observed on the surface at 4.8K, including atomically-resolved islands of √2x√2 surface reconstruction, and 2x1 reconstruction. We will discuss our high-resolution STS results in light of recent theoretical calculations.

*This work is based on research supported by the National Science Foundation, Grant No. 0955625 (BB, ML, MI).

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Presenters

  • Brandon Blue

    • Department of Physics, University of Central Florida
    • Univ of Central Florida
    • Physics, Univ of Central Florida

Authors

  • Brandon Blue

    • Department of Physics, University of Central Florida
    • Univ of Central Florida
    • Physics, Univ of Central Florida

  • Michael Lodge

    • Univ of Central Florida

  • Christopher Eckberg

    • Univ of Maryland - College Park

  • Masa Ishigami

    • Department of Physics, University of Central Florida
    • Univ of Central Florida
    • Physics, Univ of Central Florida

  • Johnpierre Paglione

    • Center for Nanophysics and Advanced Materials , University of Maryland
    • CNAM, Department of Physics, University of Maryland
    • Univ of Maryland-College Park
    • Department of Physics, University of Maryland
    • CNAM, Department of Physics, Univ of Maryland-College Park
    • Univ of Maryland - College Park
    • College Park, MD 20742-4111, Univ of Maryland-College Park
    • Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland
    • Center for Nanophysics and Advanced Materials, University of Maryland
    • University of Maryland, College Park
    • University of Maryland