72 citations · 297 across the 12 of their papers we have counts for
4 papers · 1 filter
Anomalous topological edge states in non-Hermitian piezophononic media
Penglin Gao, Morten Willatzen, Johan Christensen
The bulk-boundary or bulk-edge correspondence is a principle relating surface confined states to the topological classification of the bulk. By combining non-Hermitian ingredients…
Electronic structure and tunability of 2D hexagonal boron arsenide
Mathias Rosdahl Brems, Morten Willatzen
Group theory and density functional theory methods are combined to obtain compact and accurate Hamiltonians that describe the bandstructures around the and point…
Strain-enhanced optical absorbance of topological insulator films
Mathias Rosdahl Brems, Jens Paaske, Anders Mathias Lunde +1
Topological insulator films are promising materials for optoelectronics due to a strong optical absorption and a thickness dependent band gap of the topological surface states. The…
Dynamics of a nanowire superlattice in an ac electric field
Aizhen Zhang, L. C. Lew Yan Voon, M. Willatzen
With a one-band envelope function theory, we investigate the dynamics of a finite nanowire superlattice driven by an ac electric field by solving numerically the time-dependent Sch…