Dolgov Oleg

Name: Oleg Dolgov
Room: 6 D 15
Phone: +49 (0)711 - 689-1665
Fax:  +49 (0)711 - 689-1632  
Address:  Max-Planck-Institut für Festkörperforschung
Heisenbergstr. 1
70569 Stuttgart 


Curriculum Vitae


Research Areas

  • Theory of response functions of condensed matter.
  • Theory of dielectric permeability and magnetic permittivity in solids.
  • Theory of superconductivity.
  • Electron-phonon interaction in superconductors.
  • High-temperature superconductors: electron-phonon interaction.
  • High-temperature superconductors: optical properties.
  • High-temperature superconductors: thermodynamical and transport properties.
  • Heavy-fermion systems.
  • Superconducting properties of fullerenes.
  • Electromagnetic properties of Abrikosov vortices.


Scientific biography

I started my scientific life as a graduate student at Moscow Institute of Physics and Technology, (Department of Theoretical Physics and Astrophysics headed by Prof. V.L. Ginzburg). My diploma thesis ( under the supervision of Prof. D.A.Kirzhnits) was devoted to the superconductivity of the matter under the superstrong pressure and its application to white dwarfs. After graduation in 1975 I continued my education as a Ph. D. student at the same
Department and at I.E. Tamm Theoretical Department of P.N. Lebedev Physical Institute of the Academy of Sciences of the USSR. Here my works were related to the problem of high temperature superconductivity.
From September, 1978 I was a staff member of the Lebedev Physical Institute. My work there was covering several different areas, including the theory of electromagnetic response functions and the theory of superconductivity. In
the former I should like to mention general restrictions on static values of electrodynamic response functions (with D.A. Kirzhnits and V.V.Losyakov ).
  After the discovery of high-Tc superconductivity in 1986 my main interest was in the investigation of the dynamical and thermodynamical properties of these compounds. The main attention was attached to the model
of the strong retarded electron-phonon ( or, generally, electron-boson) interaction. It was shown that this model leads to the new effects in superconductors, e.g. to the positive curvature of an upper magnetic field (with L.N. Bulaevskii) and to the absence of the Hebel-Slichter peak in the NMR relaxation rate just below Tc (with A.A. Golubov). This allow to explain some experimental data for superconducting cuprates. The large number of publications was devoted to the investigation of the optical properties of high-Tc superconductors. It was found that, in contrast to the standard Fermi-liquid theory, the optical scattering rate in normal state systems with the strong retarded interaction has quasilinear frequency dependence in a broad frequency interval ( with E.G. Maksimov and S.V. Shulga), what was observed experimentally in cuprates. Is was propose a
method for the analysis of the intermediate boson spectra from the optical experimental data. This approach was applied to the high-Tc superconductors and systems with heavy fermions. An optical conductivity of
the superconductors with extremally strong electron-boson interaction ( with R. Combescot and D. Rainer).
    Recently a number of papers was published in which the model with predominantly forward interelectron scattering ( due to strong correlations) was investigated ( with M.L. Kulic).
    Another recent activity ( with N. Schopohl) concerns the macroscopic response of superconductors on the electromagnetic influence. In particular it was shown that the wide spread statement about the linear temperature
dependence of the magnetic penetration depth in anisotropic superconductors contradicts to the third law of thermodynamics.

Last Update: December 2004