"Using scanning micro-x-ray diffraction we report a mixed real and reciprocal space visualization of the spatial heterogeneity of the lattice incommensurate supermodulation in a single crystal of Bi(2)Sr(2)CaCu(2)O(8+y) with T(c) = 84 K. The mapping shows an amplitude distribution of the supermodulation with large lattice fluctuations at a microscale with similar to 50% amplitude variation. The angular distribution of the supermodulation amplitude in the a-b plane shows a lattice chiral symmetry, forming a left-handed oriented striped pattern. The spatial correlation of the supermodulation is well described by a compressed exponential with an exponent of 1.5 +\/- 0.3 and a correlation length of similar to 50 mu m, showing intrinsic lattice disorder in high-temperature superconductors."
Nicola, P., Gaetano, C., Fratini, M., Alessandro, R., Naurang Lal, S., Antonio, B. (2011). Spatial inhomogeneity and planar symmetry breaking of the lattice incommensurate supermodulation in the high-temperature superconductor Bi_{2}Sr_{2}CaCu_{2}O_{8+y}. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 84(10) [10.1103/PhysRevB.84.100504].
Spatial inhomogeneity and planar symmetry breaking of the lattice incommensurate supermodulation in the high-temperature superconductor Bi_{2}Sr_{2}CaCu_{2}O_{8+y}
FRATINI, MICHELA;
2011-01-01
Abstract
"Using scanning micro-x-ray diffraction we report a mixed real and reciprocal space visualization of the spatial heterogeneity of the lattice incommensurate supermodulation in a single crystal of Bi(2)Sr(2)CaCu(2)O(8+y) with T(c) = 84 K. The mapping shows an amplitude distribution of the supermodulation with large lattice fluctuations at a microscale with similar to 50% amplitude variation. The angular distribution of the supermodulation amplitude in the a-b plane shows a lattice chiral symmetry, forming a left-handed oriented striped pattern. The spatial correlation of the supermodulation is well described by a compressed exponential with an exponent of 1.5 +\/- 0.3 and a correlation length of similar to 50 mu m, showing intrinsic lattice disorder in high-temperature superconductors."I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
