Regensburg 2016 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 71: 2D Materials beyond Graphene -Dynamics and Excitation
(Joint session of DS, DY, HL, MA, O and TT organized by O)

TT 71.7: 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)