Superconductivity under high pressure in LaFeAsO
  Electrical resistivity measurements under high pressures up to 29 GPa were performed for oxypnictide compound LaFeAsO. We found a pressure-induced superconductivity in LaFeAsO. The maximum value of Tc is 21 K at ~12 GPa. The pressure dependence of the Tc is similar to those of LaFeAsO1-xFx series reported previously. 
H. Okada, K. Igawa, H. Takahashi, Y. Kamihara, M. Hirano, H. Hosono,   K. Matsubayashi, and Y. Uwatoko