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Free keywords:
competing interactions; polarons; Kondo; Lattice
Abstract:
The magnetic properties of a system of coexisting localized spins and
conduction electrons are investigated within an extended version of the
one-dimensional Kondo lattice model in which effects stemming from the
electron-lattice and on-site Coulomb interactions are explicitly
included. After bosonizing the conduction electrons, is it observed
that intrinsic inhomogeneities with the statistical scaling properties
of a Griffiths phase appear, and determine the spin structure of the
localized impurities. The appearance of the inhomogeneities is enhanced
by appropriate phonons and acts destructively on the spin ordering. The
inhomogeneities appear on well-defined length scales and can be
compared to the formation of intrinsic mesoscopic metastable patterns
which are found in two-fluid systems.
