Yevgeniy Syrkin, Leading Researcher. E-mail: syrkin@ilt.kharkov.ua  Graduated from Kharkov State University in1965. PhD Phys & Math, ILTPE, 1974. DrS Phys & Math, ILTPE, 1990. Started work at ILTPE in 1967. Has occupied the position of Professor of the Department of General and Experimental Physics of NTU ”Kharkivskiy Politechnical Institute” since 2002. Visiting Professor at Max Plank Institute (Dresden, Germany) in 1998 and at P. J. Shafarik University (Kosize, Slovak Republic) in the years 1991-2004 with a currently being implemented Agreement on cooperation with the last one. Participated in more than 50 international conferences and has published about 200 articles in Ukrainian and international journals on physics.

The main achievements are:

Dynamics of Highly Anisotropic (Quasi Low Dimensional) and Multi Layer Crystals

The condition of creation and characteristics of localized states connected with point impurities and continuous defects (twins, interfaces, adsorbed layers, etc.) were investigated and analyzed in detail.

Shear waves localized near a mono-atomic layer adsorbed on the free surface of a strongly anisotropic layered crystal are studied at the microscopic level using a vector lattice model with translational and rotational invariance and elastic stability. It is shown that in some cases a non-central inter-atomic interaction results in the appearance of surface shear waves of a special type with one or two termination points and a damping parameter which is a non-monotonic function the two–dimensional wave vector.

Multi-channel resonance transmission of phonons through the interface of the point contact Si-Cu was studied using the theory of capillary effects. We showed that anomalous peaks of the reduced heat flow at temperatures exceeding 2K are induced by the resonance transport of phonons through different layers of impurity atoms. Characteristics of channels of the phonon heat flow are calculated. The data obtained were in good agreement with the experimental results. The investigations are fulfilling in the frames of Agreement on cooperation between P. J. Safarik University (Kosice, Slovak Republic) and ILTPE.

Selected publications:

1. A.M. Kosevich, Yu.A. Kosevich, E.S. Syrkin, Vibrations Localized Near
   Surface and Interfaces in Nontraditional Crystals, (review) Progress in Surface
   Science, 55, N1, 1997.

2. Т.Г. Петрова, Е.С. Сыркин, Поверхностные спиновые волны в гейзенберговских
   ферромагнетиках, (обзор) ФНТ, т.17, N4, с.411-432, 1991.

3. Yu.A. Kosevich, E.S. Syrkin, Dissipative Interaction and Anomalous
   Surface Absorption of Bulk Phonons at Two-Dimensional Defects in a Solid,
   Phys. Letters A, 251, 1999.

4. 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, (2001) 186-197.

5. S.B.Feodosyev, M.A.Mamalui, E.S.Syrkin Dynamical characteristics of infinite and semi-infinite 1D structure with defects in presence of activation, Synthetic Metals, 121 (2001) 1333-1334.

6. S.B.Feodosyev, I.A.Gospodarev, V.I.Grishaev, E.S.Syrkin, Vibrational dynamics and ther-oynamical characteristics of the superlattices based on the metal-hydrogen system, Low Temperature Physics, 29, No 6, (2003) 530-533.