1. Pressure-induced Superconductivity in CaFe2As2 -JPCM 20, 322204 (2008)
Tuson Park1, 2 , H. Lee1, E. Park2,
F. Ronning1, E. Bauer1, T. Klimczuk1,
J. D. Thompson1
Los Alamos National Laboratory, USA
Dept. Physics, Sungkyunkwan University, Korea
Crystal structure of AFe2As2
-Ronning et al., JPCM 20, (2008)

2. Pressure-induced Superconductivity
Resistance of CaFe2As2 – Park et al., JPCM 20, (2008)
Superconductivity at 0.69 GPa
Tc = 11 K mid point)
Hc2 = 13.9 T with slope of -1.4 T/K
Positive slope near Tc => multiband SC

3. First order Transition at 172 K
Specific heat of CaFe2As2 – Ronning et al., JPCM 20, (2008)
Neutron diffraction of CaFe2As2 – Goldman et al., Arxiv:
Tetragonal to Orthorhombic
SDW: commensurate along a-axis, 0.82 mB / Fe

4. Coexistence of magnetism and superconductivity
Resistivity of CaFe2As2 under pressure – Lee et al., unpublished
=> Coexistence of magnetism & superconductivity

5. Summary
Discovery of SDW CaFe2As2 (Ronning et al., JPCM 20, (2008); Ni et al., arXiv: ; Wu et al., arXiv: )
Pressure-Induced Superconductivity (Park et al., JPCM 20, (2008); Torikachvili et al., PRL 101, (2008))
Coexistence of Magnetism and Superconductivity (Lee et al., unpublished)
Discovery of new SCs …
(Ronning et al., to appear in JPCM)