B. Verkin Institute for Low Temperature Physics and Engineering National Academy of Science (NAS) of Ukraine
DEPARTMENT OF POINT-CONTACT SPECTROSCOPY
Head of the Department
Projects and Grants
Main web-page of ILTPE
The department staff consists of 11 collaborators, among them are
2 Doctors (Ph. D. Habil.): Naidyuk Yu. G., Zolochevskii I. V. and
investigation of the modern superconductors ó 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
Atlas of point-contact spectra of electron-phonon interactions for more than 30 metals was published.
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.
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.