Exact Insulating and Conducting Ground States of a Periodic Anderson Model in Three Dimensions

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We present a class of exact ground states of a three-dimensional periodic Anderson model at 3/4 filling. Hopping and hybridization of d and f electrons extend over the unit cell of a general Bravais lattice. Employing novel composite operators combined with 55 matching conditions the Hamiltonian is cast into positive semidefinite form. A product wave function in position space allows one to identify stability regions of an insulating and a conducting ground state. The metallic phase is a non-Fermi liquid with one dispersing and one flat band.
4 pages, 3 figures

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Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/20872

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0302206
 http://arxiv.org/abs/cond-mat/0302206
 Phys. Rev. Lett. 91, 186401 (2003)
 doi:10.1103/PhysRevLett.91.186401

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arXiv