Languages:

Ukrainian, English, Russian

Education:

Field of Scientific Interest:

Lattice Dynamics:

• Propagation and localization of vibrations in heterogeneous structures and disordered systems, strongly anisotropic crystal structures, and quasi-low-dimensional lattices.
• Quasi-particle spectra and low temperature heat capacity of nanosystems.
• Vibrational characteristics and low temperature heat capacity of quasi-low-dimensional crystals containing defects.

Main achievements:

• The quantum-interference effect is predicted in metal plates of thickness L ≤ l₀ (l₀ is the mean free path) upon multichannel specular reflection of electrons at the metal surface in a weak magnetic field H perpendicular to the plate boundary. The effect consists in an increase in the Hall coefficient R (for small values of H) as compared to its normal value by a factor of p_F L / ћ (p_F is the characteristic Fermi momentum). The expression obtained for R are found to be valid for an arbitrary number of multichannel specular reflection channels. (in collaboration with A.A. Slutskin).
• Basic vibrational characteristics of fcc solid inert gases (including the quantum Ne crystal) and some fcc metals (Ag, Cu, Pb, Pd) were described to a fairly high degree of accuracy in the framework of a model taking into account only the interaction of the nearest neighbors. In this case the force constants can be calculated unambiguously from the known components of the elastic constant tensor and lattice constant.
• The features of phonon spectra and their effect on the vibrational heat capacity of linear chains of inert gas atoms adsorbed onto a substrate, which is the surface of nanotubes bound to a nanobandle are studied. The conditions of the existence and the main characteristics (frequencies, intensities, and attenuation parameters) of discrete vibrational levels caused by structural defects of linear chains of inert gas atoms adsorbed on the surface of nanotubes aggregated in nanobundles, are calculated and analyzed.

Professional Experience:

Selected Conferences:

1. 10-th International Conference on Cryocrystalas and Quantum Crystals, Almaty, Kazakhstan, August31-September7, 2014.
2. 11-th International Conference on Cryocrystalas and Quantum Crystals, Turku, Finland, 18-24 August, 2016.
3. 12-th International Conference on Cryocrystalas and Quantum Crystals, Wrocław/Wojanów, Poland 26-31 August, 2018.

Publications:

Number of papers: 36 (in the refereed journals - 29)

Selected Publications for the last 10 years:

1. E. V. Manzhelii and S. B. Feodosyev, “Localized atomic vibrations caused by point impurity in long chains of noble gas atoms adsorbed in outer grooves of carbon nanotube bundle”, Low Temp. Phys., 51, 1205, (2025) [Fiz. Nyzk. Temp., 51, 1337, (2025)]
2. S.B. Feodosyev, V.A. Sirenko, E.S. Syrkin, E.V. Manzhelii, I.S. Bondar, K.A, Minakova, “Localized and quasi-localized energy levels in the electron spectrum of graphene with isolated boron and nitrogen substitutions”, Low Temp. Phys., 49, 30 (2023) [Fiz. Nyzk. Temp., 49, 34 (2023)].
3. I.A. Gospodarev, V.I. Grishaev, E.V. Manzhelii, V.A. Sirenko, E.S. Syrkin, S.B. Feodosyev, “Effect of size quantization upon electron spectra of graphene nanoribbons”, Low Temp. Phys., 45, 187 (2020) [Fiz. Nyzk. Temp., 46, 231 (2020)].
4. E. V. Manzhelii, S. B. Feodosyev , and I. A. Gospodarev, “Phonon spectra and vibrational heat capacity of quasi-one-dimensional structures formed by rare gas atoms on the surface of carbon nanotube bundles” Low Temp. Phys. 45, 355 (2019) [Fiz. Nizk. Temp. 45, 404 (2019)].
5. S. B. Feodosyev, I. A. Gospodarev, E. V. Manzhelii, V. A, Sirenko and E. S.Syrkin, “Phonon spectra and vibrational heat capacity of quasi-one-dimensional structures formed by rare gas atoms on the surface of carbon nanotube bundles” Low Temp. Phys. 45, 763 (2019) [ Fiz. Nizk. Temp.45, 892 (2019)].
6. E.V. Manzhelii, “Influence of Defects on Vibrational Characteristics of Linear Chains of Inert Gases Atoms Adsorbed on Carbon Nanobundles” JLTP, 187, 105 (2017).
7. I.A. Gospodarev, V.I. Grishaev, E.V. Manzhelii, E.S. Syrkin, S.B. Feodosyev, K.A. Minakova “Phonon heat capacity of graphene nanofilms and nanotubes” ” Low Temp. Phys. 43, 264 (2017) [ Fiz. Nizk. Temp.43, 322 (2017)] .
8. E.V. Manzhelii, S.B. Feodosyev, I.A. Gospodarev, E.S. Syrkin and K.A. Minakova, “Phonon spectrum and vibrational characteristics of linear nanostructures in solid matrices” Low. Temp. Phys., 41, 557 (2015) [Fiz. Nizk. Temp. 41, 718 (2015)].