V. Darakchieva

activity

20132025

most citedAnisotropy, phonon modes, and free charge carrier parameters in monoclinic

β

-gallium oxide single crystals

216 citations · 675 across the 29 of their papers we have counts for

collaborators

30 papers

physics.ins-det2025

Terahertz frequency-domain 4x4 Mueller matrix ellipsometer instrument designed for high-frequency magnetic resonance measurements

Viktor Rindert, Alexander Ruder, Steffen Richter +4

We report a Mueller matrix ellipsometer design using dual continuously rotating anisotropic meta wave plates which determines the full set of Mueller matrix elements in the teraher…

cond-mat.mtrl-sci2024

The strain-stress relationships for coherent in-plane strain in heterostructures with monoclinic crystal systems: $β$ -(Al $_{x}$ Ga $_{1 - x}$ ) $_{2}$ O $_{3}$ on $(h 0 l)$ $β$ -Ga $_{2}$ O $_{3}$ as example

Mathias Schubert, Rafal Korlacki, Vanya Darakchieva

In this work we derive the state of strain or stress under symmetry conserving conditions in pseudomorphic lattices with monoclinic symmetry. We compare surface vectors across the…

cond-mat.mtrl-sci2024★ 2 cited

The paramagnetic Lyddane-Sachs-Teller relation

Viktor Rindert, Vanya Darakchieva, Tapati Sarkar +1

In this letter, we derive an expression for magnetic dipole transitions that is analogous to the Lyddane-Sachs-Teller relation for dielectric polar lattice vibrations. We thereby d…

cond-mat.mtrl-sci2024

Bloch equations in Terahertz magnetic-resonance ellipsometry

Viktor Rindert, Steffen Richter, Philipp Kühne +3

A generalized approach derived from Blochs equation of motion of nuclear magnetic moments is presented to model the frequency, magnetic field, spin density, and temperature depende…

cond-mat.mtrl-sci2024

Effective uniaxial dielectric function tensor and optical phonons in ( $2 ˉ 01$ )-plane oriented $β$ -Ga $_{2}$ O $_{3}$ films with equally-distributed six-fold rotation domains

Alyssa Mock, Steffen Richter, Alexis Papamichail +11

Monoclinic $β$ -Ga $_{2}$ O $_{3}$ films grown on $c$ -plane sapphire have been shown to exhibit six $(2 ˉ 01)$ -plane oriented domains, which are equally-spaced-by-rotation around the su…

physics.app-ph2022★ 1 cited

Polarity control by inversion domain suppression in N-polar III-nitride heterostructures

Hengfang Zhang, Ingemar Persson, Jr. -Tai Chen +5

Nitrogen-polar III-nitride heterostructures offer advantages over metal-polar structures in high frequency and high power applications. However, polarity control in III-nitrides is…

Terahertz frequency-domain 4x4 Mueller matrix ellipsometer instrument designed for high-frequency magnetic resonance measurements

The strain-stress relationships for coherent in-plane strain in heterostructures with monoclinic crystal systems: β-(Alx​Ga1−x​)2​O3​ on (h0l) β-Ga2​O3​ as example

The paramagnetic Lyddane-Sachs-Teller relation

Bloch equations in Terahertz magnetic-resonance ellipsometry

Effective uniaxial dielectric function tensor and optical phonons in (2ˉ01)-plane oriented β-Ga2​O3​ films with equally-distributed six-fold rotation domains

Polarity control by inversion domain suppression in N-polar III-nitride heterostructures

The strain-stress relationships for coherent in-plane strain in heterostructures with monoclinic crystal systems: $β$ -(Al $_{x}$ Ga $_{1 - x}$ ) $_{2}$ O $_{3}$ on $(h 0 l)$ $β$ -Ga $_{2}$ O $_{3}$ as example

Effective uniaxial dielectric function tensor and optical phonons in ( $2 ˉ 01$ )-plane oriented $β$ -Ga $_{2}$ O $_{3}$ films with equally-distributed six-fold rotation domains