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.
M. Vojta et al., "Spin Excitations in Fluctuating Stripe Phases of Doped Cuprate Superconductors," Physical Review Letters, American Physical Society (APS), Jan 2006.
The definitive version is available at http://dx.doi.org/10.1103/PhysRevLett.97.097001
German Academic Exchange Service (DAAD)
National Science Foundation (U.S.)
Virtual Quantum Phase Transitions Institute
Keywords and Phrases
Charge Mode; Coupled Spin; Fluctuating Stripe
Article - Journal
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