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; N. A. Samarin; V. V. Glushkov

doi:10.1016/S0921-4526(02)02022-7

Quantum critical point in CuGeO3 doped with magnetic impurities

Strongly Correlated Electrons 2009-11-10 v1

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

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Abstract

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.

Keywords

pair breaking phase fluctuations disordered superconductors YBCO point defects

Cite

@article{arxiv.cond-mat/0301595,
  title  = {Quantum critical point in CuGeO3 doped with magnetic impurities},
  author = {S. V. Demishev and Y. Inagaki and M. M. Markina and H. Ohta and S. Okubo and Y. Oshima and A. A. Pronin and N. E. Sluchanko and N. A. Samarin and V. V. Glushkov},
  journal= {arXiv preprint arXiv:cond-mat/0301595},
  year   = {2009}
}

Comments

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

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