143 citations · 702 across the 18 of their papers we have counts for
11 papers · 1 filter
Band Offsets at β/γ- Interface
Huan Liu, Ilja Makkonen, Calliope Bazioti +4
Ultrawide bandgap semiconductor gallium oxide (Ga2O3) and its polymorphs have recently attracted increasing attention across physics, materials science, and electronics communities…
Compton scattering study of strong orbital delocalization in a LiNiO cathode
Veenavee Nipunika Kothalawala, Kosuke Suzuki, Johannes Nokelainen +17
Cobalt is used in Li-ion batteries, but it is expensive and could be replaced by nickel to deliver better performance at a lower cost. With this motivation, we discuss how the char…
Quantum Monte Carlo study of Doppler broadening of positron annihilation radiation in semiconductors and insulators
Kristoffer Simula, Jan Härkönen, Iuliia Zhelezova +3
Positron annihilation in solid state matter can be utilized to detect and identify open-volume defects. The momentum distribution of the annihilation radiation is an important obse…
Split Ga vacancies and the unusually strong anisotropy of positron annihilation spectra in -GaO
Antti Karjalainen, Vera Prozheeva, Kristoffer Simula +4
We report a systematic first principles study on positron annihilation parameters in the -GaO lattice and Ga mono-vacancy defects complemented with orientation-dependent…
Positron surface state as a spectroscopic probe for characterizing surfaces of topological insulator materials
Vincent Callewaert, K. Shastry, Rolando Saniz +8
Topological insulators are attracting considerable interest due to their potential for technological applications and as platforms for exploring wide-ranging fundamental science qu…
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…