Disorder driven quantum critical behavior in CuGeO3 doped with magnetic impurity

Details Disorder driven quantum critical behavior in CuGeO3 doped with magnetic impurity Disorder driven quantum critical behavior in CuGeO3 doped with magnetic impurity

2004-08-03

arxiv.org/abs/cond-mat/0408059v1

Physics

Condensed Matter

Strongly Correlated Electrons

Submitted to SCES04

Scientific paper

10.1016/j.physb.2005.01.391

For the CuGeO3 doped with 1% of Fe the quantum critical behavior in a wide
temperature range 1-40 K is reported. The critical exponents for susceptibility
along different crystallographic axes are determined: a=0.34 (B//a and B//c)
and a=0.31 (B//b). New effect of the frequency dependence of the critical
exponent is discussed.

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