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  1. No Access

    Article

    Superconductivity in SrTiO3: Dielectric Function Method for Non-Parabolic Bands

    The dielectric function method for superconductivity has been applied to SrTiO3 accounting for the non-parabolic dispersion of charge carriers in the conduction band and for the dispersion of optical phonons base...

    S. N. Klimin, J. Tempere, J. T. Devreese… in Journal of Superconductivity and Novel Mag… (2019)

  2. No Access

    Article

    Anderson–Bogoliubov Collective Excitations in Superfluid Fermi Gases at Nonzero Temperatures

    The Anderson–Bogoliubov branch of collective excitations in a condensed Fermi gas is treated using the effective bosonic action of Gaussian pair fluctuations. The spectra of collective excitations are treated ...

    S. N. Klimin, H. Kurkjian, J. Tempere in Journal of Low Temperature Physics (2019)

  3. No Access

    Article

    Multiband Superconductivity Due to the Electron–LO–Phonon Interaction in Strontium Titanate and on a SrTiO3/LaAlO3 Interface

    In strontium titanate, the Fröhlich electron – LO-phonon interaction dominates the electron response and can also provide superconductivity. Because of high LO-phonon frequencies in SrTiO3, the superconducting sy...

    S. N. Klimin, J. Tempere, J. T. Devreese… in Journal of Superconductivity and Novel Mag… (2017)

  4. No Access

    Article

    Thermodynamic Functions for Superfluid Fermions in Two Dimensions

    The parameters of state for interacting ultracold fermionic atoms with s-wave pairing in 2D are calculated as a function of temperature in the superfluid, pseudogap and normal states. The pseudogap pairing temper...

    J. Tempere, S. N. Klimin, J. T. Devreese in Journal of Low Temperature Physics (2013)

  5. No Access

    Article

    Pair Excitations and Parameters of State of Imbalanced Fermi Gases at Finite Temperatures

    The spectra of low-lying pair excitations for an imbalanced two-component superfluid Fermi gas are analytically derived within the path-integral formalism taking into account Gaussian fluctuations about the sa...

    S. N. Klimin, J. Tempere, Jeroen P. A. Devreese in Journal of Low Temperature Physics (2011)

  6. No Access

    Article

    Fluctuation Spectral Functions and Phase Transitions for Cold Fermi Gases in 2D

    We study cold fermions in 2D that are interacting through the s-wave contact potential, using the path-integral formalism. The phase transitions are investigated using the joint solution of the gap and number equ...

    S. N. Klimin, J. Tempere in Journal of Low Temperature Physics (2011)

  7. No Access

    Article

    Thermodynamic Quantities of Imbalanced 2D Fermi Gases Near the Berezinskii-Kosterlitz-Thouless Transition

    We investigate the effects of imbalance on the two-dimensional Berezinskii-Kosterlitz-Thouless superfluid transition for a Fermi gas in a parabolic trap. Thermodynamic parameters of the Fermi gas are determine...

    J. Tempere, S. N. Klimin, J. T. Devreese… in Journal of Low Temperature Physics (2010)

  8. No Access

    Article

    Wigner lattice of ripplopolarons in a multielectron bubble in helium

    The properties of ripplonic polarons in a multielectron bubble in liquid helium are investigated on the basis of a path-integral variational method. We find that the two-dimensional electron gas can form deep ...

    J. Tempere, S.N. Klimin, I.F. Silvera… in The European Physical Journal B - Condense… (2003)