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

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

2001-07-10

arxiv.org/abs/cond-mat/0107187v1

J. Phys. Soc. Jpn. 70 (2001) 1881

Physics

Condensed Matter

Superconductivity

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

Scientific paper

10.1143/JPSJ.70.1881

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.

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