Browsing Geldart, Wally by Issue Date
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Effect of finite mean free path on spinflip scattering rates near the critical point of magnetically ordered systems
The finite electron mean free path of conduction electrons is found to play an important role in determining spinflip scattering rates, 1/sf, near a magnetic critical point. Smallmomentumtransfer processes are suppressed ... 
Surfaceinduced quantum density oscillations in the presence of an external magnetic field
The electron number density and spin density near the surface of a model metal, semimetal, or semiconductor are calculated in the presence of a uniform magnetic field. The magnetic field is applied in a direction perpendicular ... 
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 ... 
Fourthorder gradient contributions in extended ThomasFermi theory for noninteracting fermions at finite temperature
Nonlocal corrections to the free energy of a system of noninteracting fermions are considered within the framework of extended ThomasFermi theory. The density and temperature dependence of gradient corrections is given ... 
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 ... 
Exchange and correlation energy in a nonuniform fermion fluid
Recent results for the surface energy of jelliumlike surfaces are investigated within the functionaldensity formalism. These results along with firstprinciples considerations support the contention that the first gradient ... 
Nonlocal exchange energy of manyfermion systems of arbitrary dimensionality and interparticle interaction
The exchange contributions to the groundstate energy of an inhomogeneous manyfermion system of arbitrary dimensionality are calculated. Explicit results are given for both the localdensity approximation and the lowestorder ... 
Dipoledipole interactions and the critical resistivity of gadolinium
Results are presented for the electrical resistivity of a caxis single crystal of highpurity gadolinium metal in the immediate vicinity of the Curie temperature. Numerical analysis reveals that the data are not well ... 
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 ... 
Lattice sums for dipolar systems
A general method for the evaluation of lattice sums determining the effective parameters in the Hamiltonian of a dipolar magnetic system is described. The anisotropy of the Hamiltonian is examined for crystal structures ... 
Diamagnetic susceptibility of a dense electron gas
The authors calculate the diamagnetic susceptibility of a uniform interacting electron gas in the randomphase approximation. From this the exact highdensity expansion of the diamagnetic susceptibility is obtained 

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 ... 
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 ... 
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, ... 
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 ... 
Plasmons in disordered, twocomponent, quasitwodimensional electron systems
The authors investigate the effect of elastic scattering of electrons on the properties of plasmons in a disordered, twocomponent, quasitwodimensional electron gas. Numerical results are given for dispersion relations ... 
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. ... 
Shortdistance expansion for the spinspin correlation function of uniaxial dipolar systems
Motivated by recent work on the critical resistivity of gadolinium, a detailed study has been made of the temperature dependence of the twopoint vertex function in the largemomentum regime. The operatorproject expansion ...