43 citations · 179 across the 9 of their papers we have counts for
9 papers
Theory of the coupling of transition metal impurities with free carriers in ZnO
Anna Ciechan, Piotr Bogusławski
The exchange coupling between the spins of band carriers and of transition metal (TM) dopants ranging from Ti to Cu in ZnO is studied within the density functional theory.…
Green luminescence and calculated optical properties of Cu ions in ZnO
O. Volnianska, P. Boguslawski
There are two characteristic optical transitions associated with Cu ions in ZnO, the 0.72 eV infrared and the 2.86 eV structured green luminescence (SGL). While the former is unamb…
Transition metal ions in ZnO: effects of intrashell Coulomb repulsion on electronic properties
A. Ciechan, P. Bogusławski
Electronic structure of the transition metal (TM) dopants in ZnO is calculated by first principles approach. Analysis of the results is focused on the properties determined by the…
Alloy broadening of the transition to the non-trivial topological phase of Pb_{1-x}Sn_{x}Te
A. Lusakowski, P. Boguslawski, T. Story
Transition between the topologically trivial and non-trivial phase of Pb_{1-x}Sn_{x}Te alloy is driven by the increasing content of Sn, or by the hydrostatic pressure for $x<0.…
Calculated optical properties of Co in ZnO: internal and ionization transitions
A. Ciechan, P. Bogusławski
Previous luminescence and absorption experiments in Co-doped ZnO revealed two ionization and one intrashell transition of electrons. Those optical properties…
Metastability of Mn in ZnO driven by strong (Mn) intrashell Coulomb repulsion: experiment and theory
A. Ciechan, H. Przybylińska, P. Bogusławski +5
Depopulation of the Mn state in ZnO:Mn upon illumination, monitored by quenching of the Mn EPR signal intensity, was observed at temperatures below 80~K. Mn ph…
Fe dopant in ZnO: 2+ vs 3+ valency and ion-carrier s,p-d exchange interaction
J. Papierska, A. Ciechan, P. Bogusławski +16
Dopants of transition metal ions in II-VI semiconductors exhibit native 2+ valency. Despite this, 3+ or mixed 3+/2+ valency of iron ions in ZnO was reported previously. Several con…
Ag and N acceptors in ZnO: ab initio study of acceptor pairing, doping efficiency, and the role of hydrogen
O. Volnianska, P. Boguslawski, E. Kaminska
Efficiency of ZnO doping with Ag and N shallow acceptors, which substitute respectively cations and anions, was investigated. First principles calculations indicate a strong tenden…
High spin states of cation vacancies in GaP, GaN, AlN, BN, ZnO and BeO: A first principles study
O. Volnianska, P. Boguslawski
High spin states of cation vacancies in GaP, GaN, AlN, BN, ZnO and BeO were analyzed by first principles calculations. The spin-polarized vacancy-induced level is located in the ba…