Evidence for competing magnetic instabilities in underdoped $\rm YBa_2Cu_3O_{6+x}$

  title={Evidence for competing magnetic instabilities in underdoped \$\rm YBa\_2Cu\_3O\_\{6+x\}\$},
  author={Victor Bal{\'e}dent and D. Haug and Yvan Sidis and V. Hinkov and C. Lin and Philippe Bourges},
  journal={Physical Review B},
We report a polarized neutron scattering study of the orbital-like magnetic order in strongly underdoped ${\rm YBa_2Cu_3O_{6.45}}$ and ${\rm YBa_2(Cu_{0.98}Zn_{0.02})_3O_{6.6}}$. Their hole doping levels are located on both sides of the critical doping $p_{MI}$ of a metal-insulator transition inferred from transport measurements. Our study reveals a drop down of the orbital-like order slightly below $p_{MI}$ with a steep decrease of both the ordering temperature $T_{mag}$ and the ordered moment… Expand

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preprint arXiv : 1008 . 3182 ; C . M . Varma
  • Phys . Rev . Lett .
  • 2009