Regensburg 2016 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 78: 2D Materials beyond Graphene: Dynamics and Excitation
HL 78.7: Vortrag
Donnerstag, 10. März 2016, 12:15–12:30, S054
Electronic excitations in transition metal dichalcogenides under the influence of dielectric environments — •Malte Rösner1, Alexander Steinhoff2, Roelof Groenewald3, Frank Jahnke2, Stephan Haas3, Christopher Gies2, and Tim O. Wehling1 — 1Institut für Theoretische Physik and Bremen Center for Computational Materials Science, Universität Bremen, Bremen, Germany — 2Institut für Theoretische Physik, Universität Bremen, Bremen, Germany — 3Department of Physics and Astronomy, University of Southern California, Los Angeles, CA, USA
We present a material-realistic approach to describe electronic interaction effects in transition metal dichalcogenides. On the basis of the Wannier function continuum electrostatics (WFCE) method [1], we are able to include the effects of the dielectric environment, which could serve as a promising tuning knob to control 2D material’s properties. We study the doping dependence and the influence of different types of dielectric environments to electronic and plasmonic properties. We find electronic band structure and plasmon dispersion changes on the eV scale.
[1] M. Rösner et al., Phys. Rev. B 92, 085102 (2015)