59 citations · 115 across the 5 of their papers we have counts for
5 papers
Point defects and p-type conductivity in Zn/1-x/Mn/x/GeAs/2/
L. Kilanski, C. Rauch, F. Tuomisto +5
Positron annihilation spectroscopy is used to study point defects in Zn/1-x/Mn/x/GeAs/2/ crystals with low Mn content 0 < x < 0.042 with disordered zincblende and chalcopyrite stru…
Pick-off annihilation of positronium in matter using full correlation single particle potentials: solid He
A. Zubiaga, F. Tuomisto, M. Puska
We investigate the modeling of positronium (Ps) states and their pick-off annihilation trapped at open volumes pockets in condensed molecular matter. Our starting point is the inte…
Matter-positronium interaction: An exact diagonalization study of the He atom - positronium system
A. Zubiaga, F. Tuomisto, M. J. Puska
The many-body system comprising a He nucleus, three electrons, and a positron has been studied using the exact diagonalization technique. The purpose has been to clarify to which e…
Identifying vacancy complexes in compound semiconductors with positron annihilation spectroscopy: a case study of InN
Christian Rauch, Ilja Makkonen, Filip Tuomisto
We present a comprehensive study of vacancy and vacancy-impurity complexes in InN combining positron annihilation spectroscopy and ab-initio calculations. Positron densities and an…
Tracking defect-induced ferromagnetism in GaN:Gd
Martin Roever, Joerg Malindretos, Amilcar Bedoya-Pinto +3
We report on the magnetic properties of GaN:Gd layers grown by molecular beam epitaxy (MBE). A poor reproducibility with respect to the magnetic properties is found in these sample…