Ab initio and Raman study of medium range ordering in GeSe2 glass

R Holomb, V Mitsa, E Akalin, S Akyuz… - Journal of non-crystalline …, 2013 - Elsevier
High resolution Raman spectra of GeSe2 glass were measured and fitted using individual
Gaussian components. The structural origin of the components were interpreted using the …

Ring-, branchy-, and cage-like AsnSm nanoclusters in the structure of amorphous semiconductors: ab initio and Raman study

RM Holomb, M Veres, VM Mitsa - 2009 - dspace.uzhnu.edu.ua
Ab initio calculations were performed on ring-, branchy-, and cage-like AsnSm nanoclusters
being the building blocks of cluster model are generally found in AsxS100-x glasses and of …

Local structure of technologically modified g-GeS2: resonant Raman and absorption edge spectroscopy combined with ab initio calculations

R Holomb*, P Johansson, V Mitsa… - Philosophical …, 2005 - Taylor & Francis
We have used resonant Raman and absorption edge spectroscopy together with first-
principle calculations in order to study the structure of GeS2 glasses (g-GeS2). The glasses …

Simulation of Raman spectra of AsxS100-x glasses by the results of ab initio calculations of AsnSm clusters vibrations

RM Holomb, VM Mitsa - 2004 - dspace.uzhnu.edu.ua
We here present ab initio calculations on small AsnSm clusters that are building blocks for
the formation of continuous random networks (CRN) generally found in AsxS100-x glasses …

Structural Nature of Boson Peak and Low‐Temperature Heat Excess in As2S3 Glass

R Holomb, V Tkáč, V Mitsa, A Feher… - physica status solidi …, 2020 - Wiley Online Library
Comparative analysis of experimentally measured Raman spectra of crystalline (c), glassy
(g), and powdered c‐As2S3 samples is performed based on vibrational modes of As6S6+ …

Boson peak in low‐frequency Raman spectra of AsxS100‐x glasses: nanocluster contribution

R Holomb, V Mitsa, P Johansson… - physica status solidi …, 2010 - Wiley Online Library
The origin of the Boson peak was investigated using Raman spectroscopy and ab initio
calculations. Low frequency Raman active vibrational modes of different branchy‐, ring‐and …

Super-bandgap light stimulated reversible transformation and laser-driven mass transport at the surface of As2S3 chalcogenide nanolayers studied in situ

R Holomb, O Kondrat, V Mitsa, M Veres… - The Journal of …, 2018 - pubs.aip.org
The super-bandgap laser irradiation of the in situ prepared As-S chalcogenide films was
found to cause drastic structural transformations and unexpected selective diffusion …

Modeling and first-principles calculation of low-frequency quasi-localized vibrations of soft and rigid As–S nanoclusters

R Holomb, P Ihnatolia, O Mitsa, V Mitsa, L Himics… - Applied …, 2019 - Springer
Experimental and theoretical studies were performed on Boson peak of binary As x S 100− x
glasses and As–S polycrystalline composites (mixtures of glass with polycrystallites) of …

Localized states model of GeS2 glasses based on electronic states of GenSm clusters calculated by using TD-DFT method

RM Holomb, VM Mitsa, P Johansson - 2005 - dspace.uzhnu.edu.ua
The first-principles calculation based on time dependent–density functional theory (TDDFT)
reveals the origin of the molecular electronic structure and its connection to the localized …

Deuteron irradiation induced changes in amorphous AsSe films

I Ivan, S Szegedi, L Daroczi, IA Szabo… - Nuclear Instruments and …, 2005 - Elsevier
Optical parameters of amorphous AsSe layers have been found to be sensitive to relatively
low energy (40–180keV) deuteron irradiation. The changes of the optical absorption edge …