Browsing Geldart, Wally by Title
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Quantum critical behavior in the insulating region of the twodimensional metalinsulator transition
We show that the quantum critical point associated with the metalinsulator transition phenomenon in two dimensions controls an extended critical region encompassing not only the usual quantum critical sector but also a ... 
Resistive anomalies at the critical point of isotropic ferromagnets
The effect of spin fluctuations on electrical resistivity (T) is studied in a singleband model. It is shown that d(T)/dT varies as the magnetic specific heat for TTc as well as TTc and that both shortrange and longrange ... 
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 ... 
Small and large wavelength contributions to the exchange and correlation energy of a nonuniform electron gas
For the uniform electron gas, the decomposition of the exchange and correlation energy into its individual wave vectors has proved invaluable for both a deeper understanding of its structure as well as its extensions to ... 
Spin correlations in the lowdensity electron system
The authors have calculated the spin susceptibility x(q,) within a microscopic model over the full range of densities of the electron liquid in the paramagnetic state. Electronelectron interactions are described by static ... 
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 ... 
Temperature dependent resistivity in the lowresistance region for diffusive transport in two dimensions
The interpretation of the metalinsulator transition phenomena in disordered twodimensional electron systems in terms of densitydependent scaling variables suggests the existence of a quantum critical point at some ... 
Theory of impurityconcentration dependence of freezing temperatures of metallic spin glasses
The authors present a theory of the freezing temperature Tg of metallic spin glasses. Length scales associated with intrinsic sd scattering and finite temperature play essential roles. They describe an approach in which ... 
Theory of SpinFluctuation Resistivity Near CriticalPoint of BinaryAlloys and Antiferromagnets
No abstract available. 

Twocomponent scaling near the metalinsulator bifurcation in two dimensions
We consider a twocomponent scaling picture for the resistivity of twodimensional (2D) weakly disordered interacting electron systems at low temperature with the aim of describing both the vicinity of the bifurcation and ... 
Umklapp electronelectron scattering and the lowtemperature electrical resistivity of the alkali metals
The Umklapp fraction, , for electronelectron scattering in the alkali metals has been calculated using firstprinciples pseudopotentials. Both Coulomb scattering and phononexchange scattering have been included. For a ... 
Universal correction to scaling amplitude ratios for inhomogeneous ferromagnets with continuous symmetry
Critical exponents and amplitude ratios for corrections to the scaling limit are calculated for a randomly diluted, weakly inhomogeneous O(m) Heisenberg model in an expansion in =4d. Calculations for the exponents and ... 
Wavevector analysis of metallic surface energy
The exchange and correlation energy of a nonuniform electronic system can be decomposed into contributions of different wavevector fluctuations. Both the long and shortwavelength contributions to this energy can be ... 
Wavevector decomposition of the exchange and correlation contributions to a metallic surface energy
The authors decompose the lowestorder nonlocal corrections to the localdensity approximation to the exchange and correlation component of the metallic surface energy in terms its wavevector components. Comparison with ...