Critical quasiparticles in single-impurity and lattice Kondo models
Abstract
Quantum criticality in systems of local moments interacting with itinerant electrons has become an important and diverse field of research. Here we review recent results which concern (a) quantum phase transitions in single-impurity Kondo and Anderson models and (b) quantum phase transitions in heavy-fermion lattice models which involve critical quasiparticles. For (a) the focus will be on impurity models with a pseudogapped host density of states and their applications, e.g., in graphene and other Dirac materials, while (b) is devoted to strong-coupling behavior near antiferromagnetic quantum phase transitions, with potential applications in a variety of heavy-fermion metals.
Keywords
Cite
@article{arxiv.1507.04595,
title = {Critical quasiparticles in single-impurity and lattice Kondo models},
author = {Matthias Vojta and Ralf Bulla and Peter Wölfle},
journal= {arXiv preprint arXiv:1507.04595},
year = {2015}
}
Comments
18 pages, 4 figs, mini-review. arXiv admin note: text overlap with arXiv:1208.3113