Book/Report

FZJ-2020-01126

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Neuartige Ansätze zur Behandlung des elektronischen Vielteilchenproblems in kondensierter Materie

Biermann, S. (Corresponding author)FZJ*

2001
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/24378

Report No.: Juel-3899

Abstract: The investigation of the properties of an interacting many-particle system isone of the key problems in modern solid state physics.In the first part of this work, a recently developed method for the descriptionof correlated electrons beyond the local density approximation is studied.The application to the $\textit{fcc}$-phase of Manganese ($\gamma$-Mn) shows that this material can be considered as a strongly correlated metal. This statement is inagreement with recent photoemission data.In the second part, the possibility of describing many-particle systemsby means of supersymmetric methods is investigated. A representation ofthe time evolution operator of an interacting many-particle system is derivedas a functional integral over supervectors. We discuss similarities to anddifferences from familiar functional integral representations as well as problemsthat hamper further developments of the theory.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000 ; Retrocat)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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Database coverage:

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