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Title: Application of the plane-wave-based perturbation theory to the density modulation induced by a point charge in an electron gas
Other Titles: Many-body approaches at different scales: a tribute to Norman H. March on the occasion of his 90th birthday
Authors: Nagy, I.
Glasser, M.L.
Editors: G. G. N. Angilella and C. Amovilli
Issue Date: 2018
Abstract: The induced electron density at the position of a single point charge Z embedded in a three-dimensional degenerate electron gas is studied at high densities. The perturbative, plane-wave-based treatment developed within the framework of density matrices by March and Murray (Phys Rev 120: 830, 1960, [1]) is applied here up to second order in Z. Comparison with the result obtained by considering the exact scattering enhancement in a bare Coulomb field is made. The small numerical difference found in the second-order term of the induced density at contact is analyzed following Wigner’s (Phys Rev 94: 77, 1954, [2]) similar perturbative treatment of the proton field in the hydrogen atom. The impact of the many-body screening is discussed as well.
Departament : Física Teórica. Atómica y Óptica
ISSN: 978-3-319-72373-0.
Sponsor: Ministerio de Economía, Industria y Competitividad (Project MTM2014-57129-C2-1-P)
Junta de Castilla y León (programa de apoyo a proyectos de investigación - Ref. VA057U16)
Publisher Version:
Language: eng
Rights: info:eu-repo/semantics/openAccess
Appears in Collections:FM - Artículos de revista

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