Quantum critical point with competing propagating and diffusive spin excitations

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Feedback effects due to spin fluctuation induced precursors in the fermionic quasiparticle spectrum are taken into account in the description of a quantum critical point of itinerant spin systems. A correlation length dependent spin damping occurs, leading to a dynamical scaling with z\approx 1 which non-trivially competes with the conventional spin wave behavior. We obtain, within a one loop renormalization group approach, a quantitative explanation for the scaling behavior seen in underdoped cuprate superconductors.
4 pages, 4 figures

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Strongly Correlated Electrons, Superconductivity

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http://salesiana.dossiersoluciones.com/handle/123456789/28652

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9810041
 http://arxiv.org/abs/cond-mat/9810041

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arXiv