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Dresden 2006 – scientific programme

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TT: Tiefe Temperaturen

TT 30: Superconductivity: Twenty Years High-Tc Cuprates - Recent Progress

TT 30.6: Talk

Thursday, March 30, 2006, 15:15–15:30, HSZ 02

Spin excitations in fluctuating stripe phases — •Matthias Vojta1, Thomas Vojta2, and Ribhu Kaul1,31Universität Karlsruhe, Germany — 2University of Missouri, Rolla, USA — 3Duke University, Durham, USA

Using a phenomenological lattice model of coupled spin and charge modes, we determine the spin susceptibility in the presence of fluctuating stripe charge order. We assume the charge fluctuations to be slow compared to those of the spins, and combine Monte Carlo simulations for the charge order parameter with exact diagonalization of the spin sector. Our calculations unify the spin dynamics of both static and fluctuating stripe phases and support the notion of a universal spin excitation spectrum in doped cuprate superconductors.

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