Document Detail

Kondo destruction and valence fluctuations in an anderson model.
MedLine Citation:
PMID:  23002763     Owner:  NLM     Status:  In-Data-Review    
Unconventional quantum criticality in heavy-fermion systems has been extensively analyzed in terms of a critical destruction of the Kondo effect. Motivated by a recent demonstration of quantum criticality in a mixed-valent heavy-fermion system, β-YbAlB_{4}, we study a particle-hole-asymmetric Anderson impurity model with a pseudogapped density of states. We demonstrate Kondo destruction at a mixed-valent quantum critical point, where a collapsing Kondo energy scale is accompanied by a singular charge-fluctuation spectrum. Both spin and charge responses scale with energy over temperature (ω/T) and magnetic field over temperature (H/T). Implications for unconventional quantum criticality in mixed-valence heavy fermions are discussed.
J H Pixley; Stefan Kirchner; Kevin Ingersent; Qimiao Si
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Publication Detail:
Type:  Journal Article     Date:  2012-08-22
Journal Detail:
Title:  Physical review letters     Volume:  109     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-09-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  086403     Citation Subset:  IM    
Department of Physics & Astronomy, Rice University, Houston, Texas 77005, USA.
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