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arxiv: cond-mat/0301595 · v1 · submitted 2003-01-30 · ❄️ cond-mat.str-el

Quantum critical point in CuGeO3 doped with magnetic impurities

S.V.Demishev , Y.Inagaki , M.M.Markina , H.Ohta , S.Okubo , Y.Oshima , A.A.Pronin , N.E.Sluchanko
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N.A.Samarin V.V.Glushkov
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keywords criticalquantumbehaviourcharacteristiccugeo3dampsdimerdoped
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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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