The GW approximation in electronic structure theory has become a widespread tool for
predicting electronic excitations in chemical compounds and materials. In the realm of …

An important property with any new material is the band gap. Standard density functional
theory methods grossly underestimate band gaps. This is known as the band gap problem …

Investigations on plasmonic modes of graphene, topological insulators, black phosphorus,
boron nitride and two-dimensional carbides by means of transmission electron microscopy …

Topological insulators are innovative materials with semiconducting bulk together with
surface states forming a Dirac cone, which ensure metallic conduction in the surface plane …

We have implemented and applied the GW method and the static screened Bethe–Salpeter
equation (BSE) for calculating linear-response properties for quasirelativistic molecular …

Employing the GW method, we discuss the electronic and topological properties of Bi 2 Te 3
and Sb 2 Te 3 thin films consisting of one to six quintuple layers (QLs). Although both bulk …

Plasmonic particles and nanostructures are widely used in photovoltaic and photonics.
Surface plasmons were found to enhance different types of solar cells including plasmonic …

We present a combined theoretical and experimental study of the electronic structure of
stoichiometric Bi 4 Te 3, a natural superlattice of alternating Bi 2 Te 3 quintuple layers and Bi …

We generate many-body corrected tight-binding Hamiltonians for topological insulators of
the Bi 2 Se 3 family. To this end, we use ab initio calculated parameters extracted from GW …

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