4 papers
Charge-state control of carbon-related optical absorption in AlN
Helen C. Robinson, Daniil Danilin, Md Shafiqul Islam Mollik +5
Sub-bandgap optical absorption in AlN between 2 eV and 4 eV is widely observed, but its microscopic origin remains contested. Using photo-induced electron paramagnetic resonance (p…
Self-compensation by silicon centers in ultrawide-bandgap nitrides
John L. Lyons, Darshana Wickramaratne
\textit{DX} behavior limits -type carrier concentrations in ultrawide-bandgap nitrides such as aluminum nitride (AlN) and cubic boron nitride (-BN). Instead of acting as effe…
Effects of altermagnetic order, strain and doping in RuO
Darshana Wickramaratne, Marc Currie, Shelby S. Fields +2
RuO, one of the most widely studied transition metal oxides, was recently predicted to host a novel form of collinear magnetic order referred to as altermagnetism. In this stud…
Nonradiative quenching of EPR signals in germanium-doped AlGaN: evidence for DX-center formation
Jason Forbus, Darshana Wickramaratne, John L. Lyons +1
We present photo-electron paramagnetic resonance (EPR) measurements and first-principles calculations that indicate germanium (Ge) is a DX-center in AlGaN. Our photo-EPR measuremen…