First-principles theory of intrinsic spin and orbital Hall and Nernst effects in metallic monoatomic crystals

L Salemi, PM Oppeneer - Physical Review Materials, 2022 - APS
The generation of spin and orbital currents is of crucial importance in the field of spin-
orbitronics. In this work, using relativistic density functional theory and the Kubo linear …

Formation of vacancies and metallic-like domains in photochromic rare-earth oxyhydride thin films studied by in-situ illumination positron annihilation spectroscopy

Z Wu, T De Krom, G Colombi, D Chaykina… - Physical review …, 2022 - APS
Rare-earth (RE) oxyhydride thin films show a color-neutral, reversible photochromic effect at
ambient conditions. The origin of the photochromism is the topic of current investigations …

Optical properties of oxygen-containing yttrium hydride thin films during and after the deposition

M Zubkins, I Aulika, E Strods, V Vibornijs, L Bikse… - Vacuum, 2022 - Elsevier
The synthesis of the photochromic YHO films is based on the oxidation of deposited yttrium
hydride in ambient conditions. The actual state of the films during the deposition process …

Influence of crystal structure, encapsulation, and annealing on photochromism in Nd oxyhydride thin films

D Chaykina, F Nafezarefi, G Colombi… - The Journal of …, 2022 - ACS Publications
Thin films of rare earth metal oxyhydrides show a photochromic effect, the precise
mechanism of which is yet unknown. Here, we made thin films of NdH3–2 x O x and show …

Memory effect in photochromic rare-earth oxyhydride thin films studied by in situ positron annihilation spectroscopy upon photodarkening-bleaching cycling

Z Wu, L De Wit, M Beek, G Colombi, D Chaykina… - Physical Review …, 2024 - APS
Cycling stability of the photochromic effect in rare-earth oxyhydride thin films is of great
importance for long-term applications such as smart windows. However, an increasingly …

[HTML][HTML] Effects of H vacancies on photochromic properties of oxygen-containing yttrium hydride

D Moldarev, E Pitthan, M Wolff… - Nuclear Instruments and …, 2024 - Elsevier
We present in-situ studies of H loss from YHO films using ion beam analysis and its effect on
the photochromic properties. The film evaporates loosely bound H under exposure to a …

[HTML][HTML] A new setup for optical measurements under controlled environment

D Moldarev, K Komander, R Holeňák, M Wolff… - Review of Scientific …, 2023 - pubs.aip.org
We present a new analytical instrument for studying the optical properties of materials in
different gaseous environments at room and controlled elevated temperatures. The system …

Correlating Photoconductivity and Optical Properties in Oxygen‐Containing Yttrium Hydride Thin Films

S Kazi, D Moldarev, MV Moro… - physica status solidi …, 2023 - Wiley Online Library
Oxygen‐containing yttrium hydride (YHO), primarily known for its photochromic properties,
simultaneously shows a photoconductive response. Polycrystalline YHO thin films are …

[HTML][HTML] Perspective on the photochromic and photoconductive properties of Rare-Earth Oxyhydride thin films

B Dam, F Nafezarefi, D Chaykina, G Colombi… - Solar Energy Materials …, 2024 - Elsevier
Abstract Rare-Earth oxyhydrides (REH 3-2x O x) are characterized by photodarkening when
illuminated by photons having an energy exceeding that of the band gap. We propose that …

[HTML][HTML] A new system for sample synthesis, preparation and modification combined with in-situ depth profiling using medium energy ions

R Holeňák, D Moldarev, E Ntemou, T Tsakiris, C Frank… - Vacuum, 2025 - Elsevier
We present equipment for sample synthesis, preparation and modification enabling in-situ
studies employing medium energy ion beams at the ion implanter facility of the Tandem …