A strong exchange field, such as produced by ferromagnetically aligned impurities in a metal, will tend to polarize the conduction electron spins. If metal is superconductor, this happen only if spin-exchange field sufficiently compared energy gap. When enough break many pairs, self-consistent gap equation modified and new type of depaired superconducting ground state occurs. In idealization spatially uniform with no scattering, it found that has dependent complex Gorkov corresponding...

Following Ritchie, the anomalous characteristic energy losses of lower than plasmon energy, exhibited by some metals, are attributed to quantized surface waves degenerate electron gas. Although Ritchie's theory has been verified for an ideal pure metal Powell and Swan reflection high-energy electrons, transmission experiments show a loss generally. This is accounted taking into account relaxation produced oxide coating on metal. In this way, experimental data completely without assumption...

We have been studying the statistical mechanics of one-dimensional Ginzburg-Landau fields for real, complex, and phase-only fields. Here, results specific heat, order-parameter-order-parameter, energy-density-energy-density correlation functions, will be presented. Formally, these solutions are interest because they describe behavior systems which nearly ordered but do not undergo sharp phase transitions. Physically, real-field may application in some organic chain systems, while complex...

A new method of computing the correlation energy a degenerate electron gas is presented in which interactions are studied by considering self-energy lone particle impurity system. The results as quantum electro-dynamics from action proper field set up charged back on itself; Feynman space-time formulation mechanics employed calculation, carried out along lines already laid Lindhard. propagator, takes one point to another, derived. slight but essential change propagator needed allow for...

Because of their highly collective nature it is predicted that plasma oscillations in a thin metal film should, under the proper circumstances, give off ultraviolet radiation. The can be excited by fast electrons, incident normal to and inelastically scattered it. Surface effects are essential, special types which occur plane parallel slab electron gas, only involving motion radiate. yield computed one photon for every thousand electrons at 10 kev. radiation frequency,...

The long orthopositronium lifetime observed by Paul and Graham Wackerle Stump in liquid helium is evidence of a pickoff annihilation rate smaller more than one order magnitude the to be expected on basis average electron density. This discrepancy removed taking into account repulsive positronium-helium exchange force already derived previous work. By repelling atoms creating cavity, or bubble, liquid, positronium atom able avoid contact with thereby greatly increase its lifetime. small...

The critical slowing down of the diffusion in a binary liquid is calculated from fluctuation-dissipation theorem. fluctuating current product local fluctuations concentration and velocity. Assuming statistical independence these variables yields results identical to those found by Kawasaki using another method.

Near the liquid-vapor critical point, diverging thermal-expansion coefficient causes a localized entropy change to produce an immediate temperature throughout entire fluid, thereby greatly accelerating approach equilibrium.

The absence of a characteristic length at the lambda temperature ${T}_{\ensuremath{\lambda}}$ liquid helium is used to determine wave-number dependence phase fluctuations and second-sound dispersion relation $\ensuremath{\omega}=a{k}^{\frac{3}{2}}$ where $\ensuremath{\omega}$ $\stackrel{\ensuremath{\rightarrow}}{\mathrm{k}}$ are frequency wave number $a\ensuremath{\approx}0.1 {\mathrm{cm}}^{\frac{3}{2}}$ ${\mathrm{sec}}^{\ensuremath{-}1}$. Further predictions...

The Josephson current that flows at zero potential difference through a barrier between two superconductors is inhibited by external magnetic fields. self fields set up the itself are shown to have detrimental effects aiso. In junction whose smallest diameter exceeds certain penetration distance lambda , arises oniy from fringe of width /sub j/ edge junction. magnitude maximum reduced since interior does not contribute effect. An estimate j/is given. (D.C.W.)

The Bohm-Pines electron plasma theory is employed to give a theoretical interpretation of some experimental results Marton et al. on the scattering 20-kev electrons by thin gold foil. General criteria are presented which can in principle select any given case between alternative mechanisms collective excitation or one-electron excitation. For general law derived and used numerical analysis data. Agreement with satisfactory.

Previous work is extended so as to provide a determination of the shortest wavelength at which plasma oscillations can be sustained by degenerate electron gas. The collective are treated without introducing coordinates, thereby avoiding possible complications associated with subsidiary conditions. Instead Hartree self-consistent field method used direct quantum-mechanical analog Bohm-Gross derivation dispersion relation. effect exchange, calculated replacing Hartree-Fock method, somewhat...

A closed-form approximant is proposed for the dynamic scaling function that characterizes behavior of wave-number---dependent diffusion order-parameter fluctuations in a fluid near critical point. The expression contains two parameters determine expected coefficient hydrodynamic and nonlocal limits. yields an accurate representation our recent experimental data 3-methylpentane nitroethane mixture mixing point with parameter values are good agreement predicted from theory.

The anomalously long lifetime of ${\mathrm{C}}^{14}$ is interpreted as being due to an accidental cancellation in the $\ensuremath{\beta}$-decay matrix element which complete about one part 160. In shell model with oscillator wave functions, general two-nucleon interactions are introduced linear velocities and satisfy various invariance requirements. As many force parameters determined from low-energy experimental nuclear data possible. strength spin-orbit fixed by...

A closed-form approximant is proposed for the crossover function which connects asymptotic critical behavior of viscosity a fluid with normal away from point. The expression used to represent enhancement near gas-liquid point fluids as temperature and density.

Following the ideas of Herzfeld, Rice, Fixman, and Mistura, we are able to establish adiabatic temperature oscillations as sole origin critical attenuation dispersion near consolute point a binary liquid. Special attention is given scaling function F(\ensuremath{\Omega}) for normalized its consolute-point value, where \ensuremath{\Omega} frequency, scaled by relaxation rate fluid. By imposing some general conditions, led empirical...

The fluctuation-dissipation formula for the viscosity in terms of stress-tensor fluctuations reproduces experimental logarithmic temperature dependence hydrodynamic viscosity. Using theoretical wave-number- and frequency-dependent problem critical diffusion, we find that effects nonlocality retardation practically cancel, resulting satisfactory agreement with a recent light scattering determination effective

The fluctuation-dissipation formula for the viscosity in terms of stress-tensor fluctuations reproduces experimental logarithmic temperature dependence hydrodynamic viscosity. Using theoretical wave-number- and frequency-dependent problem critical diffusion, we find that effects nonlocality retardation practically cancel, resulting satisfactory agreement with a recent light-scattering determination effective