Spin Excitations in Fluctuating Stripe Phases of Doped Cuprate Superconductors

Matthias Vojta
Thomas Vojta, Missouri University of Science and Technology
Ribhu K. Kaul

This document has been relocated to http://scholarsmine.mst.edu/phys_facwork/394

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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.