M. Schubert

activity

20132025

most citedBand-to-band transitions, selection rules, effective mass and exciton binding energy parameters in monoclinic β-Ga2O3

192 citations · 363 across the 16 of their papers we have counts for

collaborators

16 papers

physics.optics2025

Spectral tuning of hyperbolic shear polaritons in monoclinic gallium oxide via isotopic substitution

Giulia Carini, Mohit Pradhan, Elena Gelzinyte +26

Hyperbolic phonon polaritons - hybridized modes arising from the ultrastrong coupling of infrared light to strongly anisotropic lattice vibrations in uniaxial or biaxial polar crys…

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…

cond-mat.str-el2020

Reply to the Comment by S. Wirth et al. on "Tuning low-energy scales in YbRh $_{2}$ Si $_{2}$ by non-isoelectronic substitution and pressure"

M. -H. Schubert, Y. Tokiwa, S. -H. Hübner +4

Previously, we reported that the doping and pressure dependence of the $T^{*} (B)$ crossover in YbRh $_{2}$ Si $_{2}$ is incompatible with its interpretation as signature of a Kondo break…

cond-mat.str-el2019★ 5 cited

Tuning low-energy scales in YbRh $_{2}$ Si $_{2}$ by non-isoelectronic substitution and pressure

M. -H. Schubert, Y. Tokiwa, S. -H. Hübner +4

The heavy-fermion metal YbRh $_{2}$ Si $_{2}$ realizes a field-induced quantum critical point with multiple vanishing energy scales $T_{N} (B)$ and $T^{*} (B)$ . We investigate their ch…

cond-mat.mtrl-sci2018★ 20 cited

Phonon order and reststrahlen bands of polar vibrations in crystals with monoclinic symmetry

M. Schubert, A. Mock. R. Korlacki, V Darakchieva

We derive from an eigendielectric displacement vector summation approach the frequency order of the polar phonon modes and the polarization-dependent structure of the reststrahlen…

cond-mat.mtrl-sci2017★ 26 cited

Anisotropy and phonon modes from analysis of the dielectric function tensor and inverse dielectric function tensor of monoclinic yttrium orthosilicate

A. Mock, R Korlacki, S. Knight +1

We determine the frequency dependence of the four independent Cartesian tensor elements of the dielectric function for monoclinic symmetry Y $_{2}$ SiO $_{5}$ using generalized spectrosco…

cond-mat.mtrl-sci2017★ 21 cited

Elevated temperature dependence of the anisotropic visible-to-ultraviolet dielectric function of monoclinic beta-Ga2O3

A. Mock, J. VanDerslice, R. Korlacki +2

We report on the temperature dependence of the dielectric tensor elements of $n$ -type conductive $β$ -Ga $_{2}$ O $_{3}$ from 22 $^{\circ}$ C-500 $^{\circ}$ C in the spectral range of 1.5~eV--6.4~…

cond-mat.mtrl-sci2017★ 192 cited

Band-to-band transitions, selection rules, effective mass and exciton binding energy parameters in monoclinic β-Ga2O3

Alyssa Mock, Rafał Korlacki, Chad Briley +6

We employ an eigen polarization model including the description of direction dependent excitonic effects for rendering critical point structures within the dielectric function tens…

cond-mat.mtrl-sci2017★ 32 cited

Anisotropy, phonon modes, and lattice anharmonicity from dielectric function tensor analysis of monoclinic cadmium tungstate

A. Mock, R. Korlacki, S. Knight +1

We determine the frequency dependence of four independent CdWO $_{4}$ Cartesian dielectric function tensor elements by generalized spectroscopic ellipsometry within mid-infrared and f…

cond-mat.mes-hall2015★ 25 cited

Cavity-enhanced optical Hall effect in two-dimensional free charge carrier gases detected at terahertz frequencies

S. Knight, S. Schöche, V. Darakchieva +6

The effect of a tunable, externally coupled Fabry-Pérot cavity to resonantly enhance the optical Hall effect signatures at terahertz frequencies produced by a traditional Drude-lik…

physics.optics2013★ 4 cited

Free-charge carrier parameters of n-type, p-type and compensated InN:Mg determined by Infrared Spectroscopic Ellipsometry

S. Schöche, T. Hofmann, V. Darakchieva +6

Infrared spectroscopic ellipsometry is applied to investigate the free-charge carrier properties of Mg-doped InN films. Two representative sets of In-polar InN grown by molecular b…

physics.optics2013★ 36 cited

Electron effective mass in Al $_{0.72}$ Ga $_{0.28}$ N alloys determined by mid-infrared optical Hall effect

S. Schöche, P. Kühne, T. Hofmann +5

The effective electron mass parameter in Si-doped Al $_{0.72}$ Ga $_{0.28}$ N is determined to be $m^{*} = (0.336 \pm 0.020) m_{0}$ from mid-infrared optical Hall effect measurements. No s…

Spectral tuning of hyperbolic shear polaritons in monoclinic gallium oxide via isotopic substitution

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

Reply to the Comment by S. Wirth et al. on "Tuning low-energy scales in YbRh2​Si2​ by non-isoelectronic substitution and pressure"

Tuning low-energy scales in YbRh2​Si2​ by non-isoelectronic substitution and pressure

Phonon order and reststrahlen bands of polar vibrations in crystals with monoclinic symmetry

Anisotropy and phonon modes from analysis of the dielectric function tensor and inverse dielectric function tensor of monoclinic yttrium orthosilicate

Elevated temperature dependence of the anisotropic visible-to-ultraviolet dielectric function of monoclinic beta-Ga2O3

Band-to-band transitions, selection rules, effective mass and exciton binding energy parameters in monoclinic β-Ga2O3

Anisotropy, phonon modes, and lattice anharmonicity from dielectric function tensor analysis of monoclinic cadmium tungstate

Cavity-enhanced optical Hall effect in two-dimensional free charge carrier gases detected at terahertz frequencies

Free-charge carrier parameters of n-type, p-type and compensated InN:Mg determined by Infrared Spectroscopic Ellipsometry

Electron effective mass in Al0.72​Ga0.28​N alloys determined by mid-infrared optical Hall effect

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

Reply to the Comment by S. Wirth et al. on "Tuning low-energy scales in YbRh $_{2}$ Si $_{2}$ by non-isoelectronic substitution and pressure"

Tuning low-energy scales in YbRh $_{2}$ Si $_{2}$ by non-isoelectronic substitution and pressure

Electron effective mass in Al $_{0.72}$ Ga $_{0.28}$ N alloys determined by mid-infrared optical Hall effect