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Using the completed anisotropic Eliashberg equations valid for layered compounds, we have calculated numerically the temperature dependent nuclear magnetic resonance rate. The calculations fully include anisotropy and quasiparticle damping effects represent an extension of previous work in which...
In a model for which the pairing is due mainly to an electronic mechanism supplemented by a small phonon contribution, we study the isotope effect exhibited by the upper critical magnetic field H
c2 and compare with the critical temperature. When paramagnetic impurities are added, we find very...
New measurements of second sound attenuation in bulk flowing He II are reported which extend to a region of higher Reynolds number. An expression for the attenuation explicitly containing the quantum vortex line density is developed which allows comparison with vortex line density data taken by...
A new approach toward understanding the heavy fermion systems (HFS) within a framework of the almost degenerate lattice Anderson Hamiltonian in the Kondo regime is proposed. In the coherent low temperature regime operators in the effective Hamiltonian are found to belong to an SU(2J + 3)...
We have fabricated symmetrical Nb0.75Zr0.25/Oxide/Nb0.75Zr0.25 tunnel junctions having cross type geometry. The superconducting films constituting the electrodes of the junctions were obtained by RF magnetron sputtering, and the tunnel barrier was grown by natural oxidization in air. From the...
In agreement with recent theoretical predictions, volumetric vapor pressure isotherm studies indicate a substantial reduction in the adsorption of 4He at temperature near and below 2K when the graphite surface is coated with Cs.
We report observations of the first-order phase transition between the two superfluid phases of 3He. We supercool a long cylindrical sample of the higher-temperature A phase in a magnetic field in a simple dc magnetometer. We then introduce B phase at one end of the sample and observe its growth...
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