Regensburg 2002 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 22: Postersitzung III: Syst. korr. Elektr.: Theorie II (1-15), Metall-Isol.- und Phasenüberg
änge (16-33), SL: Massivmat., Bandl., Pinning, Vortexdyn., Transport, Korngr. (34-43), Niedrigdim. Syst., Magnetotransport (44-63)

TT 22.10: Poster

Donnerstag, 14. März 2002, 14:00–17:30, A

Density of states of one-dimensional correlated electron systems — •Eric Jeckelmann — Philipps-Universität Marburg

The single-particle density of states of large one-dimensional correlated electron systems (up to 256 sites) is calculated numerically using the dynamical density-matrix renormalization-group method [1]. The density of states of an infinite chain is determined with a resolution as small as 1% of the bare bandwidth using a finite-size-scaling analysis adapted to dynamical correlation functions. As an illustration, I present the evolution of the density of states in the half-filled Hubbard model from the U=0 limit to the U/t=∞ limit.

[1] E. Jeckelmann, F. Gebhard, and F.H.L. Essler, Phys. Rev. Lett. 85, 3910 (2000).