1 - 9 of 9 articles
The depression of the superconducting transition temperature of LaCe alloys and the upper critical fieldH
(T) of La and LaCe was measured, down to 0.05 K. The results disagree with calculations, based on recent theories, including the temperature dependence of the spin-flip amplitude.
Anderson's scaling idea is applied to localized paramagnons in the intermediate coupling region. The technique takes as its starting point the Wang-Evenson-Schrieffer functional integral formulation of the Anderson model. It then proceeds by integrating out the effects of the highest frequency...
The ground-state energy and the compressibility of solid helium is calculated by means of a modified Brueckner theory. The Bethe-Goldstone equation is solved to give the reaction matrix or the effective interaction in coordinate space, and the ground-state energy for the two helium isotopes3He...
Lifshitz theory of van der Waals forces is used to calculate film heights and third-sound velocities for films of liquid helium on substrates of BaF2 and CaF2. The calculated film heights are in excellent agreement with the experimental values of Anderson and Sabinsky for film thicknesses ≳50 Å....
The authors investigate the physical properties of gapless semiconductors of the second kind, i.e., substances in which the conduction band is in direct contact with the valence band and the energy exhibits a square-law dependence on the momentum in the vicinity of the contact point in all...
Specific heat measurements between 0.5 and 2.4 K were carried out on pure Fe and five alloys with W (0.5, 1, 2, 5, and 10 at. % W). The electronic specific heat coefficient γ decreases linearly up to 5% W. For the 10% alloy the coefficient increased almost by a factor of two and a small term,...
A high-accuracy method for measuring helium-level changes was developed. Measurements made above 1 K were in agreement with the generally accepted behavior of the helium film. A very slight dependence of the transfer rateR on the level difference was observed atall level differences. Below ∼1 K...
It has recently been shown by us that the variation of the Kondo slopesd with the solute concentrationc in dilute magnetic alloys is somewhat similar to the variation of the functionf (= cos6 η cos 2η) with the phase shift η for ordinary scattering, and that the variation of the extremum valueS...
The static magnetization of dilute Cu(Mn) alloys with Mn concentrations between 4.2 and 106 ppm has been measured between 10 mK and 0.4 K in fields between 1 and 200 Oe. Magnetic ordering is observed and attributed to impurity-impurity interactions. However, a concentration-independent Weiss...
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