Regensburg 2004 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 24: Postersitzung III: Korrelierte Elektronen, ”Orbital Physics”
TT 24.7: Poster
Mittwoch, 10. März 2004, 14:30–19:00, Poster A
Electronic structure of quasi-one-dimensional metals: Theory vs Experiment — •Holger Benthien1, Eric Jeckelmann2, Florian Gebhard1, Michael Sing3, and Ralph Claessen3 — 1Fachbereich Physik, Universität Marburg, 35032 Marburg — 2Institut für Physik, Universität Mainz, 55099 Mainz — 3Experimental Physik II, Universität Augsburg, 86135 Augsburg
We compare theoretical and experimental results for the electronic structure of quasi-one-dimensional correlated metals. On the one hand the one-particle Green’s function is calculated numerically in the one-dimensional Hubbard model away from half filling using the dynamical density-matrix renormalization group method [1]. On the other hand the angle-resolved photoemission spectrum has been measured in the quasi-one-dimensional organic charge transfer salt TTF-TCNQ [2]. We show that the experimental spectrum at intermediate to high energy (up to about 1eV) can be explained consistently in the framework of the one-dimensional Hubbard model. In particular, our results show clear evidence for spin-charge separation in the excitation spectrum (and thus for a non-Fermi liquid) up to the energy scale of the bandwidth.
[1] E. Jeckelmann, Phys. Rev. B 66, 045114 (2002).
[2] R. Claessen et al., Phys. Rev. Lett. 88, 096402 (2002).