1994/12/12 by Herve M. Carruzzo, Clare C. Yu, Carruzzo, Herve M. +1
Physics and Astronomy · #Condensed Matter (cond-mat) #FOS: Physical sciences #cond-mat
paper · pdf · doi:10.48550/arxiv.cond-mat/9412050
4 pages (using REVTEX), 2 figures in postscript. Submitted to Physical Review Letters
arxiv created 1994/12/12 · arxiv updated 2009/11/30
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.