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TT: Fachverband Tiefe Temperaturen

TT 68: Superconductivity: Properties and Electronic Structure

TT 68.11: Talk

Thursday, March 21, 2024, 12:15–12:30, H 3010

Multi-Knob tuning of electron-phonon interactions in TMDCs — •Michael Winter, Dominik Benner, and Tim Wehling — I. Institute of Theoretical Physics, University Hamburg, Hamburg

Transition metal dichalcogenides (TMDs or TMDCs) are gaining significant interest due to their layered nature and the observation of exotic quantum phases, e.g., superconductivity and Mott physics, as well as the prediction of multi-knob tunability of these phases.

In this project, we work towards the general understanding of TMD-[hetero]bilayers from quantum-lattice models. We carry out large scale and wide parameter range ab initio calculations including plane wave density functional theory, density functional perturbation theory, and subsequent electron-phonon interaction calculations. The resulting model can incorporate effects of external electric field, pressure and there-like. With a special focus, we report on results obtained for a heterobilayer of molybdenum disulfide and tungsten diselenide.

Keywords: TMDC; Transitionmetal dichalcogenide; Migdal-Eliashberg; Electron-Phonon Interaction; 2D Materials