Browsing Geldart, Wally by Title
Now showing items 120 of 57

Adsorbate densities and surface potentials of physisorbed systems: A densityfunctional approach
A densityfunctional approach for the calculation of the density of particles adsorbed on the surface of a solid is explored including the adparticle twobody interaction. The coverages and effective surface potentials so ... 
Analytical structure of the wavenumberdependent susceptibility of manyfermion systems at low temperature and long wavelength. II
For pt.I see ibid., vol.15, p.1523 (1977). It is shown that the nonanalytic structure of the wavenumberdependent susceptibility noted by Geldart and Rasolt is not removed by including repeated particleparticle scattering 
Anharmonicity and cross section for absorption of radiation by water dimer
We calculate the absorption cross section of water dimer molecules in thermal equilibrium at temperatures typical of the lower atmosphere using quantum mechanical coupled nonlinear equations of motion. Empirical Morseoscillator ... 

Anisotropy of the critical magnetic susceptibility of gadolinium
The magnetic susceptibility along the c axis (xc) and in the basal plane (xb) has been measured on a single crystal of Gd in the reduced temperature range 4104t1.3102. Uniaxial anisotropy is observed. Magnetic dipoledipole ... 
Coefficients to O (Epsilon3) for the Mixed FixedPoint of the NmComponent Field Model
No abstract available. 
Coefficients to O(3) for the mixed fixed point of the nmcomponent field model
The nmcomponent field model has a number of application in the description of critical phenomena. The coefficients in the expansion for the stability matrix eigenvalues and correlation function exponent n for the mixed ... 
Comment on `Anisotropic superconductors with repulsive average interaction'
For original paper see M.D. Whitmore and J.P. Carbotte, ibid., vol.23, p.5782 (1981). In a recent paper Whitmore and Carbotte concluded that a sufficient condition for the superconducting state to be stable relative to the ... 
Comment on `Exact electrongas response functions at high density'
For original paper see D.C. Langreth and S.H. Vosko, ibid., vol.59, p.497 (1987). Langreth and Vosko calculated correlation contributions to the HohenbergKohn energy response function Kxc(q,k). They claimed that the results ... 
Comment on `Quantummechanical interpretation of the exchangecorrelation potential of KohnSham densityfunctional theory'
For original paper see M.K. Harbola and V. Sahni, ibid., vol.62, p.489 (1989). Harbola and Sahni suggested a procedure for constructing the exchangecorrelation potential that enters the KohnSham singleparticle equations. ... 
Contribution of water vapor dimers to clear sky absorption of solar radiation
Using previously derivedvalues of the water vapor dimer spectral absorption cross section we calculate the water vapor dimer contribution to the clear sky absorption of solar radiation. We consider the water dimer ... 
Convergence properties as a function of spatial dimensionality of gradient expansions for the groundstate energy of an inhomogeneous electron gas
The extended ThomasFermi approximation for the groundstate energy of a manyfermion system is generalized to arbitrary spatial dimension. The authors' objective is a better understanding of convergence properties of such ... 
Critical behavior of twodimensional magnetic systems with dipoledipole interactions
The critical exponents of twodimensional dipolar magnetic systems with isotropic inplane ordering may be obtained from the expansion which determines the exponents of isotropic threedimensional dipolar systems. However, ... 
Critical exponents and amplitude ratios from electrical resistivity measurements of dysprosium
Resistive anomalies in helical antiferromagnets are shown to reflect the temperature dependence of the specific heat sufficiently close to the Neel temperature. The temperature dependence of superzone energy gaps does not ... 

Critical magnetic susceptibility of gadolinium
The magnetic suspectibility of a single crystal of highpurity gadolinium has been measured in the critical region with use of AC susceptibility methods. For reduced temperatures t103, the data are described by a simple ... 

Density dependence of critical magnetic fields at the metalinsulator bifurcation in two dimensions
The density dependence of the critical inplane magnetic field Bc at the bifurcation of the resistivity of twodimensional electron systems with low levels of disorder is determined using the spinpolarization dependence ...