Browsing by Author "Gumbs, G."
Now showing items 1-5 of 5
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Convergence properties as a function of spatial dimensionality of gradient expansions for the ground-state energy of an inhomogeneous electron gas
Geldart, D. J. W.; Gumbs, G. (1986-02/15)The extended Thomas-Fermi approximation for the ground-state energy of a many-fermion system is generalized to arbitrary spatial dimension. The authors' objective is a better understanding of convergence properties of such ... -
Depth-dependent static shielding of an impurity by a quantum plasma in a magnetic field
Gumbs, G.; Geldart, D. J. W. (1984-05/15)The static shielding of a charged impurity embedded in a quantum plasma is studied with the use of linear-response theory. The required response function is calculated in the random-phase approximation with a uniform ... -
Linear-response function of a semi-infinite degenerate plasma in the presence of an external magnetic field
Glasser, M. L.; Geldart, D. J. W.; Gumbs, G. (1984-06/15)The static linear-response function x0(r,r') of a semi-infinite, degenerate plasma of noninteracting electrons is calculated in the presence of an external magnetic field perpendicular to the surface. The surface is simulated ... -
Nonlocal exchange energy of many-fermion systems of arbitrary dimensionality and interparticle interaction
Gumbs, G.; Geldart, D. J. W. (1986-11/15)The exchange contributions to the ground-state energy of an inhomogeneous many-fermion system of arbitrary dimensionality are calculated. Explicit results are given for both the local-density approximation and the lowest-order ... -
Surface-induced quantum density oscillations in the presence of an external magnetic field
Geldart, D. J. W.; Gumbs, G.; Glasser, M. L. (1985-03/15)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 ...