Ground-state properties of quasi-one-dimensional electron systems within dynamic local-field correction: Quantum Singwi-Tosi-Land-Sjo lander theory

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buir.contributor.authorTanatar, Bilal
buir.contributor.orcidTanatar, Bilal|0000-0002-5246-0119
dc.citation.epage15026en_US
dc.citation.issueNumber23en_US
dc.citation.spage15019en_US
dc.citation.volumeNumber59en_US
dc.contributor.authorTanatar, Bilalen_US
dc.contributor.authorBulutay, C.en_US
dc.date.accessioned2016-02-08T10:40:00Z
dc.date.available2016-02-08T10:40:00Z
dc.date.issued1999en_US
dc.departmentDepartment of Physicsen_US
dc.description.abstractDynamic local-field correction (LFC) brings a richer picture about the description of a many-body system than the standard mean-field theories. Here we investigate the ground-state properties of a quasi-one-dimensional electronic system using the quantum version of the Singwi-Tosi-Land-Sjölander (STLS) theory and present a critical account of its performance. The results are markedly different than those theories based on static LFC and the random-phase approximation; an example is the static structure factor, which develops a significant peak at low densities, signaling a developing ordered phase. An indication of growing instability at low densities is seen on G(q,0), the static behavior of the dynamic LFC, which has an oscillatory character with a magnitude exceeding unity, peaking exactly at 4k F. The pair-correlation function comes out as positive for the densities considered in this work. The correlation energy and the compressibility curves are seen to be quite close to the static STLS results. A flaw of the theory is the significantly negative values of the dynamic structure factor around the plasmon frequencies, also the lifetime of the plasmons turns out to be negative away from the single-pair continuum. In summary, the major shortcomings of the dynamic STLS scheme are the violation of the compressibility sum rule (as in the static STLS case) and the misrepresentation of the plasmons in the dynamic structure factor. © 1999 The American Physical Society.en_US
dc.identifier.doi10.1103/PhysRevB.59.15019en_US
dc.identifier.issn0163-1829
dc.identifier.urihttp://hdl.handle.net/11693/25149
dc.language.isoEnglishen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.isversionofhttps://doi.org/10.1103/PhysRevB.59.15019en_US
dc.source.titlePhysical Review B - Condensed Matter and Materials Physicsen_US
dc.titleGround-state properties of quasi-one-dimensional electron systems within dynamic local-field correction: Quantum Singwi-Tosi-Land-Sjo lander theoryen_US
dc.typeArticleen_US
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