Formation of spin-polarons in the ferromagnetic Kondo lattice model away from half-filling
Por:
Arredondo Y., Vallejo E., Navarro O., Avignon M.
Publicada:
22 ago 2012
Resumen:
Even though realistic one-dimensional experiments in the field of half-metallic semiconductors are not at hand yet, we are interested in the underlying fundamental physics. In this regard we study a one-dimensional ferromagnetic Kondo lattice model, a model in which a conduction band is coupled ferromagnetically to a background of localized d moments with coupling constant J(H), and investigate the T = 0 phase diagram as a function of the antiferromagnetic interaction J between the localized moments and the band-filling n, since it has been observed that doping of the compounds has led to formation of magnetic domains. We explore the spin-polaron formation by looking at the nearest-neighbour correlation functions in the spin and charge regimes for which we use the density matrix renormalization group method, which is a highly efficient method to investigate quasi-one-dimensional strongly correlated systems.
Filiaciones:
Arredondo Y.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico
Vallejo E.:
Facultad de Ingeniería Mecaínica y Eleíctrica, Universidad Autónoma de Coahuila, Ciudad Universitaria, Carretera Torreón-Matamoros Km. 7.5, 27276 Torreón, Coahuila, Mexico
Navarro O.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico
Avignon M.:
Institut Néel, CNRS, Université Joseph Fourier, Boite Postale 166, 38042 Grenoble, France
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