Evidence from neutron diffraction for superconductivity in the stabilized tetragonal phase of CaFe2As2 under uniaxial pressure
|Title||Evidence from neutron diffraction for superconductivity in the stabilized tetragonal phase of CaFe2As2 under uniaxial pressure|
|Publication Type||Journal Article|
|Year of Publication||2010|
|Authors||Prokes K, Kreyssig A, Ouladdiaf B, Pratt DK, Ni N, Bud'ko SL, Canfield PC, McQueeney RJ, Argyriou DN, Goldman AI|
|Journal 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.
|URL||<Go to ISI>://000278141800015|