Co-operative Two-Channel Kondo Effect

A. M. Tsvelik; H. Y. Kee; N. Andrei; P. Coleman

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Co-operative Two-Channel Kondo Effect

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arxiv cond-mat/9707002 v3 pith:EU6USBVP submitted 1997-07-01 cond-mat.str-el

N. Andrei , P. Coleman , H. Y. Kee , A. M. Tsvelik This is my paper · ORCID

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We discuss how the properties of a single-channel Kondo lattice model are modified by additional screening channels. Contrary to current wisdom, additional screening channels appear to constitute a relevant perturbation which destabilizes the Fermi liquid. When a heavy Fermi surface develops, it generates zero modes for Kondo singlets to fluctuate between screening channels of different symmetry, producing a divergent composite pair susceptibility. Additional screening channels couple to these divergent fluctuations, promoting an instability into a state with long-range composite order.

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