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We study the effect of disorder on a superconducting phase transition in granular arrays with dissipation. It is shown that, for a quite weak Gaussian disorder, this effect does not lead to a qualitative change of the phase diagram. Local quantum fluctuations suppress Cooper pair tunneling for a...
We investigate the effect of dissipative currents on a superconducting phase transition in two- and three-dimensional granular arrays. We find the corresponding phase diagrams and show that, depending on dissipation, both long-range and local quantum fluctuations may be effective in destroying...
Under a wide range of circumstances, experiments at the superfluid-solid interface of4He are shown to yield information on only one combination of surface Onsager coefficients. This combination contains the growth coefficient as well as the Kapitza resistance and the cross coefficient.
We consider penetration of magnetic flux in the rare earth ceramic superconductors within the framework of a generalized Ginzburg-Landau theory, based on the coexistence of antiferromagnetism and superconductivity. We study vortex structure produced for a magnetic field close to
Nuclear spin relaxation of liquid3He in porous glass has been studied. In addition to measurements of the longitudinal spin relaxation timeT
1 by a usual pulsed SQUID NMR, measurements of the transverse spin relaxation timeT
2 have been performed by using a newly developed SQUID NMR method to...
The anomalous noise rise observed in nearly all types of parametric amplifiers based on Josephson junctions has been an intriguing as well as annoying problem for many years. This phenomenon has been most spectactular in microbridge amplifiers. Here we present measurements on externally pumped...
Quasi-reentrant phenomena in superconductivity conditioned by the mechanisms of phase coherence in inhomogeneous two-dimensional systems are studied on ultrathin amorphous films of bismuth. The effects are shown to be appreciably dependent on the film structures. For films of nearly island...
The chemical potentials as a function of He coverage have been determined from He adsorption isotherms measured at 1.72 K for the following thick substrates: Ne, Ar, and CO2-plated Cu, and bare Cu. The adsorption isotherm data were analyzed self-consistently using the modified...
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