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A system made up of a pair of Peshkov transducers situated at the opposite ends of a one-dimensional resonance cavity is investigated theoretically. Included are the dissipative effects of thermal diffusion and normal viscous slip through the superleak. Compared to the oscillating superleak...
We present experimental results on the attenuation and velocity of first sound in a saturated (X = 0.064) 3He-4He mixture. The measurements were performed at very low temperature (3.5
The unitary states of superfluid Fermi liquid with singlet D and triplet P type of pairing are investigated in the framework of the weak coupling approximation. The superflow pair-breaking critical current is calculated at zero temperature and in the Ginzburg-Landau region for various values of...
Since nonlinear effects are of the same importance as the particle-hole asymmetry (PHA) effects for normal Fermi liquids, at least for some physical situations, a formalism is presented taking both into account. Moreover, because the nonlinearity or PHA is easiest to induce by strong magnetic...
The current-induced breakdown of superconductivity in Zn and Zn-Ag alloy whiskers close to the critical temperature has been investigated. Above the critical current I
the superconductor enters a dissipative state with characteristics showing a regular voltage step structure due to the...
We report on observations of the onset of dissipation in superfluid 3He flowing through a single cylindrical channel of diameter d = 0.7 µm and length L = 6.0 µm. We propose a model in which thermally activated phase slips in the order parameter can account for the observed onset of dissipation.
A new real-space renormalization technique is introduced, aimed at simplifying the computation of dynamical properties of granular structures at wavelengths of order a typical grain size. The technique consists in replacing the large number of atoms within a grain by a small number of rigid...
For the first phase-slip center in superconducting whiskers of zinc and zinc-silver alloys the normalized “normal-like length” and “zero-voltage intercept” are plotted as a function of the “pair-breaking parameter,” which ranges between 4 × 103 and 2 × 104. A comparison is made with results from...
Point-contact spectra of single-crystal LaB6 are obtained, yielding the energy positions of all the phonon modes up to 160 meV. A relatively strong anisotropy of the spectra is observed. It is related to the anisotropy of the phonon system. The point-contact electron-phonon interaction function...
In a rotating He II-filled cylinder with an aspect ratio of 4.3 the transient evolution of the vorticity fields of the normal fluid and the superfluid component during spin-up are investigated. The acoustical method of measurement used utilizes the change of propagation time of first- and...
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