Electron-Phonon Coupling in Two-Dimensional Germanene

ORAL

Abstract

The phonon properties of the two-dimensional honeycomb allotrope of germanium, germanene, were studied by first-principles calculations. We found that the highest optical branches on the phonon dispersions at $\Gamma$ and K symmetry points of the first Brillouin zone exhibit similar behavior as in graphene and graphite, indicating possible Kohn anomalies in germanene. Electron-Phonon coupling for the high symmetric modes will be discussed.

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Authors

  • Ryan Stein

    • Department of Physics, Astronomy and Geosciences, Towson University 8000 York Road, Towson, MD 21252-0001, USA

  • David Schaefer

    • Towson University
    • Department of Physics, Astronomy and Geosciences, Towson University 8000 York Road, Towson, MD 21252-0001, USA

  • Jia-An Yan

    • Towson University
    • Department of Physics, Astronomy and Geosciences, Towson University 8000 York Road, Towson, MD 21252-0001, USA