Lattice Dynamics, phonons and
other quasi-particle excitations in solids:
- Atomic dynamics of multilayered crystals and crystals with complex
- Atomic dynamics of boundary (surface, edge and apex) atoms;
- Computer modeling of complex crystal structures and disordered systems.
The main achievements:
- Typical distinctive features of phonon spectra of the semibounded
strongly anisotropic crystals and thin layers of these compounds were
studied (in collaboration with E. S. Syrkin); there was determined the
dependence of the vibration thermodynamic characteristics of these systems
upon the mentioned above features:
- Microscopic calculations of the vibration characteristics of crystal
structures of the specified either ideal compounds or those having point and
extended defects were made;
- There were built a number of calculating models to study the phonon
spectra and vibration characteristics of crystals with complex defects,
multilayered structures of the HTSC type, nanoclusters, microcontacts, etc.
where the influence of the crystal atomic order regularity was weakened.
- Calculation of phonon spectra of heterogeneous crystals and disordered
- Calculation of electron and phonon spectra of graphite and carbonic thin
I.A.Gospodarev, S.B.Feodosyev, A.P.Isakina, A.I.Prokhvatilov, E.S.Syrkin,
Effect of the Crystalline Structure Anisotropy of the High Temperature
Superconductor Bi2Sr2CaCu2Ox on its Thermal Expansion
ÔÍÒ, 16, 673 (1990).
S.B.Feodosyev, I.A.Gospodarev, E.S.Syrkin, Anomalies of Linear Expansion
Coefficient in Highly Anisotropic Crystals at Low Temperature, Phys, Stat.
Sol (b), 150, K19, 1988.
S.B. Feodosyev, I.A. Gospodarev, A.M. Kosevich, E.S. Syrkin,
Quasi-Low-Dimensional Effects in Vibrational Characteristics of 3D-Crystals,
Phys. Low Dim. Str., 10/11, 209, 1995.
I.A. Gospodarev, A.V. Grishaev, E.S. Syrkin, S.B. Feodosyev, Local
Vibrations of FCC-Crystals with Two Parametric Substitution Impurities,
Phys. Solid State, 42, N12, 2000.
A.M. Kosevich, A. Mayer, S.B. Feodosyev, I.A. Gospodarev, V.I. Grishaev,
E.S. Syrkin, Atom Dynamics of Micro-Clusters on Atomically Smooth Surfaces,
Superlattices and Microstructures, 27, No 1, 7, 2000.
S.B. Feodosyev, I.A. Gospodarev, M.A. Strzhemechny, R.J. Hemley, Phonon
Assisted Ortho- Para Conversion in Solid H2 Under Pressure,
Physica B: Physics of Condensed Matter, 300, 186, 2001.
E.T. Verkhovtseva, I.A. Gospodarev, A.V. Grishaev, S.I. Kovalenko, D.D.
Solnyshkin, E.S. Syrkin, S.B. Feodosyev, Atom Dynamics and the Problem of
the Structural Stability of Free Clusters of Solidified Inert Gases, Low
Temperature Physics, 29, No 5, 386, 2003.
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.
I.A. Gospodarev, K.V. Kravchenko, E.S. Syrkin and S.B. Feodos’ev
Quasi-two-dimensional features in the phonon spectrum of graphite Low Temp.
Phys. 35, No 7 589, 2009.
A. Feher, I.A. Gospodarev, V.I. Grishaev, K.V. Kravchenko, E.V.
Manzheliĭ, E.S. Syrkin and S.B. Feodos’ev, Effect of defects on the
quasiparticle spectra of graphite and graphene, Low Temp. Phys. 35,
I.K. Galetich, I.A. Gospodarev, V.I. Grishaev, A.V. Eremenko, K.V.
Kravchenko, , V.A. Sirenko, S.B. Feodosyev, Vibrational characteristics of
the niobium dichalcogenide. Bulk samples and nanofilms, Superlattices and
Microstructures, 45, No 6, 564, 2009
I.A. Gospodarev, V.V. Eremenko, K.V. Kravchenko, V.A. Sirenko, E.S.
Syrkin and S.B. Feodos’ev Vibrational characteristics of niobium diselenide
and graphite nanofilms Low Temp. Phys. 36,
Alexander Feher, Eugen Syrkin, Sergey Feodosyev, Igor Gospodarev and
Kirill Kravchenko Quasi-Particle Spectra on Substrate and Embedded Graphene
Monolayers, in: “Physics and Application of Graphene – Theo-ry” (ed. S. Mikhailov)
“InTex” Open Access Publisher, ISBN 978-953-307-996-7 Croatia, 2010.
E. Syrkin, I. Gospodarev, E. Manzhelii, A. Kotlyar, K. Kravchenko, The
Features of Low Frequency Atomic Vibrations and Propaga-tion of Acoustic
Waves in Hete-rogeneous Systems, in: “Waves in Fluids and Solids” (ed. R.P. Vila)
“InTex” Open Access Publisher, ISBN 978-953-307-246-3 Croatia,
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 Ukraine, 2011
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
I.A. Gospodarev, A.V. Eremenko, K.V. Kravchenko, A.F. Sirenko, V.A.
Sirenko, E. S. Syrkin, S.B. Feodosyev, and Yu. A. Shabakaeva, Distinctive
Features of Thermal Expansion of Niobium Diselenide, Physics of the Solid
State, 55 No. 4, 825, 2013