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The influence of superflow on the order parameter collective modes in3He-B is investigated for temperatures 0≤T/T
≤0.5 by the continual integral method. The superflow induces a gap distortion, which splits the pair-breaking, squashing, and real squashing modes at zero momentumk. Furthermore, a...
Transverse and longitudinal galvanomagnetic effects in nondegenerate semiconductors in an ultraquantum magnetic field and at superlow temperaturesT≪m
2 are investigated, wherem
∥ is the electron mass along the magnetic field andu is the sound velocity. One-phonon processes are forbidden by...
We report phonon transmission studies of the interface between solid helium and dilute solutions of3He in liquid4He. We have measured the transmission of phonons from the solid into the liquid and the rate of exchange of energy between the phonons in the solid and the3He quasiparticles in the...
A kinetic equation is derived that describes the nonequilibrium quasiparticle distribution function for a dilute, inhomogeneous Bose gas below its λ-point. The derivation is based on a microscopic description of the Bose gas, and is similar to that used to obtain the classical Boltzmann equation...
The influence of a parallel magnetic field on the quasiparticle recombination time of superconducting tin tunneling junctions has been determined experimentally. The results are compared with the predictions of a theoretical model that takes into account the modification of the quasiparticle...
The soliton solutions for the time-dependent Ginzburg-Landau equations that describe the motion of the condensate in a superconductor in a weak field are found by an approximate approach, using a perturbation method.
The resistanceR and the superconducting transition temperatureT
O4 has been investigated under pressure up to 150 kbar. TheT
is enhanced andR is suppressed by pressure. The results indicate that the superconductivity in this oxide system is ofd character associated with the...
The critical temperatureT
and residual resistivity ρ0 were measured in homogeneously oxidized thin vanadium foils. The per at % oxygen induced variations are respectively ΔT
=−1.2K and Δρ0=53 nΩ-m. TheT
data are used to calculate the electron-phonon coupling constant, which decreases...
The value of the critical current for a type II (κ≫1) superconducting slab placed in a magnetic fieldH
c2) parallel to the sample surface and with a currentI flowing perpendicular to the magnetic field is obtained. This critical current depends on the characteristic length of...
The acoustic plasmon is considered as a possible low energy excitation mode in a simple two-band (s andd) model. Going an order further than the random phase approximation allows the exchange interactions to be taken into account. Under certain conditions the acoustic plasmon exchange between...
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