Lattice Dynamics, phonons and
other quasi-particle excitations in solids:
- Vibrational characteristics of crystals with complex
- Dynamics of complex crystal lattices, strongly
anisotropic crystal structures, and
- Quasi-particle spectra of nanosystems.
- Microscopic calculations on the atomic dynamics of
the real crystal structures (ideal and with defects)
were made. New method for the localized states
description based on J-matrix was suggested.
- Investigation of localization and propagation of
vibrations in heterogeneous crystals and disordered
- Creation of calculation models for investigation of
electron and phonon spectra of graphene based
A.V. Kotlyar and S.B. Feodosyev, Local oscillations
in crystal lattices with a simply connected region of
the quasi-continuonsphonon spectrum, Low Temperature
Physics, 32, No 3, 256, 2006.
I.A. Gospodarev, V.I. Grishaev, O.V. Kotlyar, K.V.
Kravchenko, E.V. Manzhelii, E.S. Syrkin, and S.B. Feodosyev,
Ioffe–Regel crossover and boson peaks in disordered
solid solutions and similar peculiarities in
heterogeneous crystal structures
Low Temperature Physics, 34, No 8, 655, 2008.
A. Kosevich, I. Gospodarev, V. Grishaev, A. Kotlyar,
V. Kruglov, E. Manzhelii, E. Syrkin, S. Feodosyev,
Specific Features of the Transformation of Local Levels
into an Impurity Band of Ag1-pAlp
Disordered Solid Solutions, J. Exp. Theor. Phys. 105, 4,
E. Syrkin, I. Gospodarev, E. Manzhelii, A. Kotlyar, K. Kravchenko,
The Features of Low Frequency Atomic Vibrations and
Propaga-tion of Acoustic Waves in Heterogeneous Systems,
in: “Waves in Fluids and Solids” (ed. R.P. Vila)
“InTex” Open Access Publisher,
ISBN 978-953-307-246-3 Croatia, 2011.
I. Gospodarev, O.V. Kotlyar, K.V Kravchenko, E.V. Manzhelii,
E.S Syrkin, A.V.Yeremenko, I.K. Galetich, Low
Temperature Peculiarities of Quasi-Particle Spectra of
Disordered Solid Solutions, in: “Contemporary Problems
of Mathematics, Mechanics and Computer Sciences” (eds. N.N. Kizilova,
G.N. Zholtkevich) PRB Virovec’,ISBN 978-966-2579-92-5
A.Feher, I.Gospodarev, O.Kotlyar, K.Kravchenko,
E.Manzhelii, E.Syrkin, S.Feodosyev Impurity levels in
the electron spectra of graphene, Superlattices and
Microstructures, 53, 55, 2013
- S. Feodosyev, I. Gospodarev, V. Grishaev, A. Kosevich,
O. Kotlyar, E. Syrkin, Phonon Spectra and Discrete
Oscillatory Levels in Crystal Superlattices of
Deuterium- and Hydrogen-Palladium Solid Solutions, J. of
Low Tem. Phys. 139, 665, 2005.