5 papers
From pseudo-direct hexagonal germanium to direct silicon-germanium alloys
Pedro Borlido, Jens Renè Suckert, Jürgen Furthmüller +3
We present ab initio calculations of the electronic and optical properties of hexagonal SiGe alloys in the lonsdaleite structure. Lattice constants and electronic band structures i…
Efficient strain-induced light emission in lonsdaleite germanium
Jens René Suckert, Claudia Rödl, Jürgen Furthmüller +2
Lonsdaleite germanium has a direct band gap, but it is not an efficient light emitter due to the vanishing oscillator strength of electronic transitions at the fundamental gap. Tra…
Direct Bandgap Emission from Hexagonal Ge and SiGe Alloys
E. M. T. Fadaly, A. Dijkstra, J. R. Suckert +16
Silicon crystallized in the usual cubic (diamond) lattice structure has dominated the electronics industry for more than half a century. However, cubic silicon (Si), germanium (Ge)…
Accurate electronic and optical properties of hexagonal germanium for optoelectronic applications
Claudia Rödl, Jürgen Furthmüller, Jens Renè Suckert +3
High-quality defect-free lonsdaleite Si and Ge can now be grown on hexagonal nanowire substrates. These hexagonal phases of group-IV semiconductors have been predicted to exhibit i…
Comparative study of methodologies to compute the intrinsic Gilbert damping: interrelations, validity and physical consequences
Filipe S. M. Guimarães, J. R. Suckert, Jonathan Chico +3
Relaxation effects are of primary importance in the description of magnetic excitations, leading to a myriad of methods addressing the phenomenological damping parameters. In this…