218 citations · 1.8k across the 40 of their papers we have counts for
6 papers · 2 filters
Derivation of 12- and 14-band Hamiltonians for dilute bismide and bismide-nitride semiconductors
Christopher A. Broderick, Muhammad Usman, Eoin P. O'Reilly
Using an tight-binding model we demonstrate how the observed strong bowing of the band gap and spin-orbit-splitting with increasing Bi composition in the dilute bismi…
Composition dependent band gap and band edge bowing in AlInN: A combined theoretical and experimental study
S. Schulz, M. A. Caro, L. -T. Tan +3
A combined experimental and theoretical study is presented of the band gap of AlInN, confirming the breakdown of the virtual crystal approximation (VCA) for the conduction and vale…
12-band model for dilute bismide alloys of (In)GaAs derived from supercell calculations
Christopher A. Broderick, Muhammad Usman, Eoin P. O'Reilly
Incorporation of bismuth (Bi) in dilute quantities in (In)GaAs has been shown to lead to unique electronic properties that can in principle be exploited for the design of high effi…
Theory of local electric polarization and its relation to internal strain: impact on the polarization potential and electronic properties of group-III nitrides
Miguel A. Caro, Stefan Schulz, Eoin P. O'Reilly
We present a theory of local electric polarization in crystalline solids and apply it to study the case of wurtzite group-III nitrides. We show that a local value of the electric p…
Impact of cation-based localized electronic states on the conduction and valence band structure of AlInN alloys
S. Schulz, M. A. Caro, E. P. O'Reilly
We demonstrate that cation-related localized states strongly perturb the band structure of N leading to a strong band gap bowing at low In content. Our…
Impact of alloy disorder on the band structure of compressively strained GaBiAs
Muhammad Usman, Christopher A. Broderick, Zahida Batool +4
The incorporation of bismuth (Bi) in GaAs results in a large reduction of the band gap energy (E) accompanied with a large increase in the spin-orbit splitting energy ($\bigtri…