Toshio Tsuzuki

Nonlinear excess conductivity above the superconducting transition point

Abstract The nonlinear excess conductivity to a static field is calculated microscopically in the framework of the Ginzburg-Landau-Gorkov approximation.

Dynamical critical phenomena in superconductivity

Abstract Critical phenomena in superconductivity are studied employing our general theory of dynamics of critical fluctuations.

Dynamic critical fluctuation in superconductors above the transition point

Abstract The correlation function of the fluctuation field in a dirty superconductor is investigated. The diffusion constant in the critical region becomes singular as (T/T c − 1) -1 3 . The electrical conductivity contains a term increasing like (T/T c − 1) -1 3 in the critical region.

Dynamical critical phenomena in liquid helium

Abstract A dynamical aspect of critical phenomena at the λ transition of liquid helium is considered employing our general theory of dynamics of critical fluctuations.

Fluctuations of order parameter and hall effect

Abstract The effects of fluctuations of order parameter in superconductors on Hall effect are investigated in weak magnetic field in the region above T c .

Nonlinear diamagnetism due to the fluctuation superconductivity

Nonlinear susceptibility due to the fluctuation superconductivity is calculated microscopically in the Ginzburg-Landau-Garkov approximation. The characteristic field of the nonlinearity is given by Hc2.

Frequency dependence of the enhanced diamagnetism above the superconducting transition point

Abstract The frequency dependence of the enhanced diamagnetic susceptibility due to the fluctuation of the superconductivity order parameter is calculated microscopically in the classical range of temperature above the transition point.