Electron correlations in two dimensions

Datum: 11 mei 2016

Locatie: University of Antwerp - Campus Groenenborger - Room U.241 - Groeneborgerlaan 171 - 2020 ANTWERPEN

Tijdstip: 16 - 17 uur

Organisatie / co-organisatie: Condensed Matter Theory

Korte beschrijving: POSTPONED
CMT seminar presented by Dr Mohammad Zarenia

Electron correlations in two dimensions

Most physical properties of solids arise from the quantum-mechanical behavior of the electrons. it has always been desirable to have a simple but accurate theoretical description of these systems. The most difficult contribution to the ground-state energy is due to electronic correlations, resulting from both Pauli exclusion and Coulomb repulsion. Based on a model for the coupling-constant dependence, which interpolates between the weak- and strong-interaction limits, and using Random Phase Approximation (RPA) we propose a new approach for the correlation energy. This model defines a density functional which predicts an accurate ground-state correlation energy for the two-dimensional (2D) uniform electron gas. This model is immediately applicable to multi-valley systems (e.g. bilayer graphene and transition metal dichalcogenides) and also to other 2D materials with non-parabolic low-energy bands (e.g. few-layer graphene).

Dr. Mohammad Zarenia, CMT group, UAntwerpen

Contact e-mail: lucian.covaci@uantwerpen.be

Url: http://cmt.uantwerpen.be