Homogeneous versus Spiral Phases of Hole-doped Antiferromagnets: A Systematic Effective Field Theory Investigation

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Using the low-energy effective field theory for magnons and holes -- the condensed matter analog of baryon chiral perturbation theory for pions and nucleons in QCD -- we study different phases of doped antiferromagnets. We systematically investigate configurations of the staggered magnetization that provide a constant background field for doped holes. The most general configuration of this type is either constant itself or it represents a spiral in the staggered magnetization. Depending on the values of the low-energy parameters, a homogeneous phase, a spiral phase, or an inhomogeneous phase is energetically favored. The reduction of the staggered magnetization upon doping is also investigated.
35 pages, 5 figures

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Strongly Correlated Electrons, High Energy Physics - Phenomenology, Nuclear Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/176123

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0609731
 http://arxiv.org/abs/cond-mat/0609731
 Phys.Rev.B75:014421,2007
 doi:10.1103/PhysRevB.75.014421

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arXiv