etñ.)
investigation of the modern superconductors — rare-earth nickelborocarbides, magnesium diboride, high-temperature and iron-based superconductors by Andreev reflection spectroscopy;
coexistence of superconductivity, magnetic ordering and spin/charge density waves;
relaxation and nonstationary processes in point contacts under high-frequency and laser irradiation;
Kondo-effect in metallic contacts;
two-level systems in metallic glasses;
conductivity quantization in 3-D nanobridges;
nonlinear and nonstationary effects in the conductivity of ferromagnetic nanocontacts due to transfer of spin momentum;
relaxation and non-stationary processes in superconducting films under high-frequency irradiation
Main results
Discovery and exploitation of the
point-contact spectroscopy method.
Atlas of point-contact spectra of electron-phonon interactions for more than 30 metals was published.
Discovery of the
Kondo-effect in point contacts
with magnetic impurities and the
Kondo-size effect.
Detection of the
thermal effects in point contacts and establishing of
modulation point-contact spectroscopy.
Establishing of
point-contact noise spectroscopy of phonons in metals.
Relaxation kinetics of nonequilibrium phonons
with Debye energies has been studied and their lifetimes were detected in a variety of metals.
Sign reverse of the point-contact spectra in semimetals
due to the strong localization.
Effect of the
conductance quantization in 3D atomic-sized metallic contacts.
Shell-effect in the conductivity of alkali metal nanowires.
Determining of the temperature and magnetic field dependence of superconducting order parameter in simple superconductors
Zn,
In, Sn, Nb by Andreev-reflection study.
Obtaining of Andreev-reflection spectra and spectra of electron-phonon interaction for some high-temperature superconductors.
Formation of
SQUID between heavy-fermion URu2Si2 and an ordinary superconductor
to determine the symmetry of the superconducting order parameter. Revealing of the strong pair-breaking effect of
the normal metal--heavy-fermion superconductor interface.
Observation of
two-gap superconducting state via Andreev-reflection spectra and specific electron-phonon interaction in MgB2.
Detection of anisotropy of
electron-phonon interaction in MgB2.
Establishing of the
two-band (gap) superconducting state in rare-earth nickel-borocarbide superconductors
on the base of Andreev-reflection spectra. Detection of a
crystal-electric field effects in these compounds.
Spin-valve effect in point contacts
with a single ferromagnetic film (Co).
Detection of the resonance excitation of the precession of the magnetization
in such contacts.
The phenomenon of microwave-radiation enhancement of superconductivity in the
microbridges,
superconducting channels and wide films was discovered and investigated.
External irradiation induced phase slip centers and lines of the order parameter in narrow and
wide superconducting films were detected and investigated.
The Wohlleben effect
was revealed in magnetic superconductors Dy1-xYxRh4B4.
Research groups
Point-contact spectroscopy of electron-quasiparticle interaction
Investigation of spin-dependent effects in conductivity of magnetic point contacts
Andreev-reflection and PC spectroscopy of modern superconductors
Investigation of the thermal (heat capacity), superconducting, ac and dc resistive properties of the modern superconducting structures
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