TY - JOUR
T1 - Local inhomogeneity and filamentary superconductivity in Pr-doped CaFe 2 as 2
AU - Gofryk, Krzysztof
AU - Pan, Minghu
AU - Cantoni, Claudia
AU - Saparov, Bayrammurad
AU - Mitchell, Jonathan E.
AU - Sefat, Athena S.
PY - 2014/1/31
Y1 - 2014/1/31
N2 - We use multiscale techniques to determine the extent of local inhomogeneity and superconductivity in Ca0.86Pr0.14Fe2As2 single crystal. The inhomogeneity is manifested as a spatial variation of the praseodymium concentration, local density of states, and superconducting order parameter. We show that the high-Tc superconductivity emerges from cloverlike defects associated with Pr dopants. The highest Tc is observed in both the tetragonal and collapsed tetragonal phases, and its filamentary nature is a consequence of nonuniform Pr distribution that develops localized, isolated superconducting regions within the crystals.
AB - We use multiscale techniques to determine the extent of local inhomogeneity and superconductivity in Ca0.86Pr0.14Fe2As2 single crystal. The inhomogeneity is manifested as a spatial variation of the praseodymium concentration, local density of states, and superconducting order parameter. We show that the high-Tc superconductivity emerges from cloverlike defects associated with Pr dopants. The highest Tc is observed in both the tetragonal and collapsed tetragonal phases, and its filamentary nature is a consequence of nonuniform Pr distribution that develops localized, isolated superconducting regions within the crystals.
UR - http://www.scopus.com/inward/record.url?scp=84894503646&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.112.047005
DO - 10.1103/PhysRevLett.112.047005
M3 - Article
AN - SCOPUS:84894503646
SN - 0031-9007
VL - 112
JO - Physical Review Letters
JF - Physical Review Letters
IS - 4
M1 - 047005
ER -