Evidence for a non-Fermi-liquid phase in Ge-substituted YbRh2Si2.
Phys Rev Lett
; 104(18): 186402, 2010 May 07.
Article
em En
| MEDLINE
| ID: mdl-20482193
ABSTRACT
The canonical view of heavy fermion quantum criticality assumes a single quantum critical point separating the paramagnet from the antiferromagnet. However, recent experiments on Yb-based heavy fermion compounds suggest the presence of non-Fermi liquid behavior over a finite zero-temperature region. Using detailed susceptibility and transport measurements we show that the classic quantum critical system, Ge-substituted YbRh(2)Si(2), also displays such behavior. We advance arguments that this is not due to a disorder-smeared quantum critical point, but represents a new class of metallic phase.
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Phys Rev Lett
Ano de publicação:
2010
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Article
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