Berlin 2005 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 16: Posters Correlated Electrons, Measuring Devices, Cryotechnique

TT 16.81: Poster

Samstag, 5. März 2005, 11:00–16:30, Poster TU C

The Kimball-Overhauser approach to the pair density of the 3D electron gas and Friedel-like phase-shift sum rules — •Paul Ziesche — Max-Planck-Insitut fuer Physik komplexer Systeme, D-01187 Dresden

Kimball-Overhauser geminals follow from a 2-body Schroedinger equation with an appropriately screened Coulomb repulsion. They parametrize the pair density together with geminal occupancies, which follow from the non-idempotent momentum distribution [1]. The neutrality sum rule for the pair density leads to sum rules for the geminal phase shifts, which resemble the Friedel sum rule of solid-state physics [2]. Friedel-like oscillations originate from the singularities of the geminal weight [3]. [1] P. Gori-Giorgi and P. Ziesche, Phys. Rev. B 66, 235116 (2002) [2] P. Ziesche, Phys. Rev. B 67, 233102 (2003) [3] P. Ziesche, phys. stat. sol. (b), in press.