1 - 10 of 23 articles
This paper presents an analysis which indicates that in a temperature range starting below T
λ, quantized vortices may form spontaneously in liquid 4He even if there is no macroscopic rotation. The theory is based on statistical mechanical calculations within the context of an elementary...
The effect of spin fluctuations in antiferromagnetic metals described by a nesting-type model is studied for paramagnetic states and for commensurate spin-density-wave states by the application of the renormalized spin fluctuation theory to the Rice model as well as to the...
Using the exact Wallraven calculation for the energy of a vortex ring coaxial with a thin orifice, I have calculated the exact low-temperature trajectories with background flow through the orifice and approximate trajectories when the temperature is finite and mutual friction is important....
Heat transport experiments with superfluid helium in pipes of 60–400 cm length and diameters between 0.3 and 1.0 cm show the existence of a critical heat current when superfluidity breaks down and vaporization onset starts. In all measurements of the critical heat flux density where breakdown of...
The Doppler-shifted velocity of third sound in a system where the superfluid flows with velocity v
s is given. The calculations are to first order in v
s/u3 where u
3 is the third-sound velocity in the rest frame. We take into account the effects of the pressure and 3He concentration gradients...
The large quasiparticle injection through a tunnel barrier is studied, in particular when the bias tunnel voltage is close to the gap edge. It is shown that the quasiparticle-injection-induced voltage threshold in a superconducting lead film has an anomalous temperature dependence above Tλ. The...
Critical currents in both superfluid 3He-A and 3He-B are calculated within a weak coupling model. The Fermi liquid correction is explicitly included. As a by-product we obtain the nonlinear superfluid densities in 3He-A and 3He-B, which depend strongly on the current.
In earlier work it was shown that a sinusoidal distribution ~cos (αx) at time t = 0 will decay as α → 0, t→ ∞ with the excitation of damped, standing waves of first sound. To consider thermal conduction in a first-sound wave, we modify the solution of the Boltzmann equation by introducing a...
The anomalous resistivity of nickel near the Curie temperature T
c is investigated using the itinerant model of the magnetic electron. The 3d-band wave functions are used to calculate the form factor. The temperature derivative of resistivity diverges positively when T approaches T
c from below...
Published measurements relating to the upper transition in solid hydrogen are reviewed and inconsistencies are pointed out. An attempt is made to connect this transition to the well-known one at low pressures and temperatures.
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