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The current-driven RSJ model is analyzed by considering the phase at the end of one rf cycle as a function of the phase at the beginning. This function has a simple analytic form. An elementary proof of the absence of current steps at subharmonic Josephson voltages is given. Properties of the...
The thermal conductivity of a regular, optically controlled, intermediate-state structure has been measured in high-purity lead with the heat current nearly perpendicular to the (static) interphase boundaries; this situation is obtained in a particular perpendicular magnetic field range by...
The behavior of a small superconducting ring or hollow cylinder in an axial magnetic field is studied using the nonlinear Ginzburg-Landau equations. We find that, if the radius of the cylinder is smaller than half the superconducting coherence length ξ(T), a periodic alternation between the...
We show that the (p, T, x) phase diagram of4He close to melting pressure (25.3 bars) with small concentrations of3He and at very low temperatures has several unanticipated and novel features. For pressures between 25.3 bars and a triple point pressurep*, estimated to be 25.8 bars, we find a...
The third-order elastic constants and the pressure derivatives of the second-order elastic constants of Mg2Pb are calculated. The Grüneisen parameters of the acoustic modes in six symmetry directions are then computed. It is significant that most of the transverse elastic modes have negative...
We study nonlinear phenomena which occur during strong sound signal propagation in superpure Ga and are due to the perturbation of the electron subsystem in the metal. Although the observations are in qualitative agreement with theoretical concepts in a number of aspects, there are effects which...
Effects of parabolic and nonparabolic band structures on ultrasonic waves propagating at an angle θ relative to the direction of a dc magnetic fieldB in a degenerate semiconductor such as n-type InSb are investigated by using a quantum treatment which is valid at high frequencies and in strong...
Results of measurements of the spin diffusion coefficientD and NMR relaxation timesT
2, and T1p are presented for a range of fractional3He concentrations 1 × 10−4≤x
3≤2.5 × 10−3 in solid4He at molar volumes 19.85≤V
m≤21.0 cm3 and temperatures 0.4
The magnetic phase transition in solid3He is described as a first-order transition induced by a spin-lattice coupling. The magnetic ground state has both a spin density wave and a lattice distortion.
The attenuation of longitudinal ultrasonic waves has been measured in single crystals of indium (99.999%), indium doped with 0.003 at % of tin, and indium doped with 0.002 at % of bismuth in the intermediate and superconducting states over the frequency range 10–30 MHz. For the bismuth-doped...
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