Quantum critical point in CuGeO3 doped with magnetic impurities

Details Quantum critical point in CuGeO3 doped with magnetic impurities Quantum critical point in CuGeO3 doped with magnetic impurities

2003-01-30

arxiv.org/abs/cond-mat/0301595v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 2 figures, to be published in Physica B

Scientific paper

10.1016/S0921-4526(02)02022-7

Using high frequency (up to 450 GHz) ESR and low temperature specific heat
measurements we find that insertion of 1% Fe and 2% Co damps spin-Peierls and
Neel transitions and for T<30K gives rise to onset of a quantum critical
behaviour characteristic for a random dimer Griffiths phase.

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