Few-body correlation effects in transition metal dichalcogenide monolayers.

Since the celebrated discovery of graphene, there has been a growing interest in two dimensional (2D) crystals for potential applications in next-generation nanoelectronic devices. Transition-metal dichalcogenides (TMDs) are a very promising class of materials that can be shaped into monolayers. Recently there has been increasing interest in these systems both theoretically and experimentally because of their particular properties. The strong Coulomb interaction in TMD monolayers makes these systems an excellent candidate for the study of different stronglycorrelated phases in 2D atomic crystals. The focus of this proposal is on excitonic effects in TMD mono- and multi-layers. I plan to investigate excitons, trions (charged excitons) and biexcitons. Recently, the stability and binding energy of these quasi-particles have been measured. The aim of my proposal is to numerically obtain the electronic and optical properties of excitons, trions and biexcitions in TMD layers and compare them with experimental data. The second part of the proposal deals with the study of excitonic superfluid properties in a system of double-TMD monolayers. I plan to show that coupled parallel TMD monolayers can be a very promising system for observing high-temperature superfluidity. This conviction is based on recent advances in fabricating TMD van der Waals heterostructures and the analogy of the system with double-bilayer graphene in which high-temperature superfluidity was predicted.

Keywords:ELEMENTARY PARTICLES

Disciplines:Condensed matter physics and nanophysics, Analytical chemistry, Macromolecular and materials chemistry

Project type:Collaboration project