Absence of a Magnetic Field Induced Metal-Insulator Transition in Kondo Insulators

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We investigate whether or not Kondo insulators undergo a magnetic field induced metal-insulator transition in one dimension at half filling using both a density matrix formulation of the numerical renormalization group and a new analytical approach. Contrary to expectations, the quasiparticle gap never vanishes at any field and no metal-insulator transition is found. We discuss generalizing our result to three dimensions and to the asymmetric Anderson lattice. Our result is consistent with recent experiments.
4 pages (using REVTEX), 2 figures in postscript. Submitted to Physical Review Letters

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Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/27222

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9412050
 http://arxiv.org/abs/cond-mat/9412050

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arXiv