Dresden 2006 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 12: Correlated Electrons: Low-dimensional Systems - Models
TT 12.4: Vortrag
Dienstag, 28. März 2006, 10:15–10:30, HSZ 304
Charge and Spin Dynamics of Strongly Correlated Quasi One-Dimensional Insulators — •Holger Benthien1 and Eric Jeckelmann2 — 1Fachbereich Physik, Philipps-Universität Marburg — 2Institut für Theoretische Physik, Universität Hannover
We calculate the momentum- and frequency-resolved dynamical spin and charge structure factors as well as the the one-particle spectral function of the extended Hubbard model. The method we apply is the dynamical density-matrix renormalisation group algorithm (DDMRG), which allows for an exact calculation of dynamical correlation functions for any range of energies and parameters. We present strong evidence that this simple model with a single set of parameters can qualitatively and quantitatively explain data from recent neutron scattering, photoemission (ARPES) and resonant inelastic X-ray scattering (RIXS) [1] experiments in the prototypical quasi one-dimensional insulator SrCuO2.
[1] Y.-J. Kim, J.P. Hill, H. Benthien, F.H.L. Essler, E. Jeckelmann, H.S. Choi, T.W. Noh, N. Motoyama, K.M. Kojima, S. Uchida, D. Casa, and T. Gog, Phys. Rev. Lett. 92, 137402 (2004).