Physics and Astronomy, Ames Laboratory
Journal or Book Title
Physical Review B
CaFe2As2 single crystals under uniaxial pressure applied along the c axis exhibit the coexistence of several structural phases at low temperatures. We show that the room-temperature tetragonal phase is stabilized at low temperatures for pressures above 0.06 GPa, and its weight fraction attains a maximum in the region where superconductivity is observed under applied uniaxial pressure. Simultaneous resistivity measurements strongly suggest that this phase is responsible for the superconductivity in CaFe2As2 found below 10 K in samples subjected to nonhydrostatic pressure conditions.
American Physical Society
Prokeš, K.; Kreyssig, A.; Ouladdiaf, B.; Pratt, D. K.; Ni, N.; Bud’ko, Sergey L.; Canfield, Paul C.; McQueeney, Robert J.; Argyriou, D. N.; and Goldman, Alan, "Evidence from neutron diffraction for superconductivity in the stabilized tetragonal phase of CaFe2As2 under uniaxial pressure" (2010). Physics and Astronomy Publications. 693.