Decay of spin-Peierls state in CuGeO3:Fe. The case of a strong disorder

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dc.creatorDemishev, S. V.
dc.creatorBunting, R. V.
dc.creatorPronin, A. A.
dc.creatorSluchanko, N. E.
dc.creatorSamarin, N. A.
dc.creatorOhta, H.
dc.creatorOkubo, S.
dc.creatorOshima, Y.
dc.creatorLeonyuk, L. I.
dc.creatorMarkina, M. M.
dc.date2001-10-09
dc.date.accessioned2026-07-25T22:01:28Z
dc.descriptionInfluence of doping by iron impurity on spin-Peierls state in CuGeO3 is studied. ESR measurements for the frequency/temperature domain 60-450 GHz/ 1.8-300 K and specific heat data obtained for the interval 6-20 K show that insertion of 1% of Fe completely destroy both spin-Peierls and antiferromagnetic orders. Damping of long-range magnetic order is accompanied by onset at T<20 K of power asymptotics for magnetic susceptibility chi~T^-alpha and magnetic part of specific heat cm~T^(1-alpha), with the index alpha=0.35-0.37. This effect is characteristic to the limit of strong disorder for doped CuGeO3 and may reflect formation of the Griffiths phase at low temperatures in CuGeO3:Fe.
dc.descriptionZipped TeX file (5 pages) + 5 EPS figures, submitted to Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/cond-mat/0110177
dc.identifierhttp://arxiv.org/abs/cond-mat/0110177
dc.identifier.urihttps://dspace.dare.co.zw/handle/123456789/85084
dc.subjectStrongly Correlated Electrons
dc.titleDecay of spin-Peierls state in CuGeO3:Fe. The case of a strong disorder
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