V. Darakchieva

activity

20172022

most citedElectron effective mass in Sn-doped monoclinic single crystal

β

-gallium oxide determined by mid-infrared optical Hall effect

59 citations · 85 across the 10 of their papers we have counts for

collaborators

Showing cond-mat.mtrl-sciShow all

9 papers · 1 filter

cond-mat.mtrl-sci2022

Strain and composition dependencies of the near bandgap optical transitions in monoclinic (Al $_{x}$ Ga $_{1 - x}$ ) $_{2}$ O $_{3}$ alloys with coherent biaxial in-plane strain on (010) Ga $_{2}$ O $_{3}$

Rafał Korlacki, Matthew Hilfiker, Jenna Knudtson +7

The bowing of the energy of the three lowest band-to-band transitions in $β$ -(Al $_{x}$ Ga $_{1 - x}$ ) $_{2}$ O $_{3}$ alloys was resolved using a combined density functional theory (DFT) and…

cond-mat.mtrl-sci2022★ 19 cited

Terahertz electron paramagnetic resonance generalized spectroscopic ellipsometry: The magnetic response of the nitrogen defect in 4H-SiC

Mathias Schubert, Sean Knight, Steffen Richter +8

We report on terahertz (THz) electron paramagnetic resonance generalized spectroscopic ellipsometry (THz-EPR-GSE). Measurements of the field and frequency dependencies of the magne…

cond-mat.mtrl-sci2021

Infrared dielectric functions and Brillouin zone center phonons of $α$ -Ga $_{2}$ O $_{3}$ compared to $α$ -Al $_{2}$ O $_{3}$

Megan Stokey, Rafal Korlacki, Matthew Hilfiker +11

We determine the anisotropic dielectric functions of rhombohedral $α$ -Ga $_{2}$ O $_{3}$ by far-infrared and infrared generalized spectroscopic ellipsometry and derive all transverse opti…

cond-mat.mtrl-sci2021

Optical phonon modes, static and high frequency dielectric constants, and effective electron mass parameter in cubic In $_{2}$ O $_{3}$

Megan Stokey, Rafal Korlacki, Sean Knight +8

A complete set of all optical phonon modes predicted by symmetry for bixbyite structure indium oxide is reported here from a combination of far-infrared and infrared spectroscopic…

cond-mat.mtrl-sci2020

The anisotropic quasi-static permittivity of single-crystal beta-Ga2O3

Prashanth Gopalan, Sean Knight, Ashish Chanana +11

The quasi-static anisotropic permittivity parameters of electrically insulating gallium oxide (beta-Ga2O3) were determined by terahertz spectroscopy. Polarization-resolved frequenc…

cond-mat.mtrl-sci2019

Infrared active phonons in monoclinic lutetium oxyorthosilicate

M. Stokey, A. Mock, R. Korlacki +3

A combined generalized spectroscopic ellipsometry measurement and density functional theory calculation analysis is performed to obtain the complete set of infrared active phonon m…