Theories of non-Fermi liquid behavior in heavy fermions

Details Theories of non-Fermi liquid behavior in heavy fermions Theories of non-Fermi liquid behavior in heavy fermions

1998-09-30

arxiv.org/abs/cond-mat/9809436v2

Physica B, 259-261, 353 (1999).

Physics

Condensed Matter

Strongly Correlated Electrons

Overview talk, SCES Paris 1998. References to Sachdev and Ye added

Scientific paper

10.1016/S0921-4526(98)00795-9

I review our incomplete understanding of non-Fermi liquid behavior in heavy fermion systems at a quantum critical point. General considerations suggest that critical antiferromagnetic fluctuations do not destroy the Fermi surface by scattering the heavy electrons- but by actually breaking up the internal structure of the heavy fermion. I contrast the weak, and strong-coupling view of the quantum phase transition, emphasizing puzzles and questions that recent experiments raise.

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