1 - 10 of 13 articles
The theoretical work of Matsuura, Ichinose, and Nagaoka on the Kondo effect in superconductors and McMillan's tunneling model are applied to a proximity-effect sandwich system containing Kondo impurities. Analytic expressions for the renormalized Green's functions of superconducting and...
The effect of a heat current across the atomically rough crystal-superfluid interface in4He has been studied below 1 K. The chemical potential difference Δμ and temperature difference ΔT were measured simultaneously, the ΔT by means of a “superfluid melting-curve thermometer.” The results give...
The influence of the scattering potential of nonmagnetic and magnetic impurities on the critical superconducting transition temperatureT
c is considered for superconductors with either a completely or partially dielectric electron spectrum. It is shown thatT
c rises with increasing concentration...
A superconducting memory device based on a bistable vortex position represents an interesting storage medium for future Josephson computers. In order to study the operational mode of such a single-flux quantum memory cell, we use as a model system multiquantum flux tubes in a thin-film type I...
The mutual friction parametersB and B′ for a moving vortex are calculated near the superfluid transition. They are proportional to the kinetic coefficient associated with the order parameter and, asT →λ, diverge as (Tλ
− T)−1/3, in agreement with experiment. The nonlinear couplings between the...
We have measured the low-temperature electrical resistivity ρ and thermal conductivity λ of a selection of RERh4B4 compounds. The compound LuRh4B4 served as the standard material concerning superconductivity and HoRh4B4 as that for magnetic ordering. For ErRh4B4 we studied, in particular, the...
Measurements of the dielectric susceptibility of a series of lanthanum ethyl sulfate/cerium ethyl sulfate crystals (5–100 at % Ce) have been made over the temperature range 0.05–20 K. The results confirm the Jahn-Teller distortion in pure cerium ethyl sulfate, demonstrate a distortion for up to...
The pseudoternary system Dy(RuxRh1−x)4B4 has been studied by means of ac magnetic susceptibility, electrical resistance, heat capacity, static magnetic susceptibility, and magnetization measurements. A low-temperature phase diagram was determined for the range of concentrations 0.1
The quasiparticle scattering amplitude is calculated from a semimicroscopic model by analytically solving a generalization of Landau's integral equation to momentum transfers up to 2
PF. This solution in general does not obey exchange symmetry for a given particle-hole irreducible vertex partf...
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