Pressure study of the new iron-based superconductor K0.8Fe2Se2
  We investigated pressure effects on transition temperature (Tc) of the new iron-based superconductor K0.8Fe2Se2 using a BeCu/NiCrAl hybrid-type clamped piston-cylinder cell. The Tc(onset) was 33K at 0.85 GPa. With increasing pressure, Tc(onset) gradually increased and reached 36.6 K at 2.03 GPa. 
Y. Kawasaki, Y. Mizuguchi, K. Deguchi, T. Watanabe, T. Ozaki, S.   Tsuda, T. Yamaguchi, Hiroyuki Takeya, Y. Takano
cond-mat.supr-con