Spin Dynamics near the Superconductor-to-Insulator Transition in Impurity-Doped YBa2Cu4O8

Y. Itoh; T. Machi; N. Watanabe; S. Adachi; N. Koshizuka

doi:10.1143/JPSJ.70.1881

Spin Dynamics near the Superconductor-to-Insulator Transition in Impurity-Doped YBa2Cu4O8

Superconductivity 2009-11-07 v1 Strongly Correlated Electrons

Authors: Y. Itoh , T. Machi , N. Watanabe , S. Adachi , N. Koshizuka

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Abstract

We studied low-frequency spin dynamics near the impurity-induced superconductor-to-insulator transition for underdoped high-Tc superconductor YBa2(Cu1-xMx)4O8 (M=Ni, Zn) using the Cu nuclear quadrupole resonance (NQR) spin-echo technique. We observed remarkable suppression of the normal-state pseudo spin-gap and a loss of Cu NQR spectrum intensity at low temperatures around the critical impurity concentration.

Keywords

spin dynamics superconductor-to-insulator transition nuclear quadrupole resonance pseudo spin-gap high-Tc superconductor impurity doping

Cite

@article{arxiv.cond-mat/0107187,
  title  = {Spin Dynamics near the Superconductor-to-Insulator Transition in Impurity-Doped YBa2Cu4O8},
  author = {Y. Itoh and T. Machi and N. Watanabe and S. Adachi and N. Koshizuka},
  journal= {arXiv preprint arXiv:cond-mat/0107187},
  year   = {2009}
}

Comments

6 pages, 4 figures. To be published in J. Phys. Soc. Jpn. Vol.70, No.7 (2001)

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