Journal
PHYSICAL REVIEW B
Volume 67, Issue 14, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevB.67.140503
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Lattice distortions associated with charge stripe order in 1/8 hole-doped La1.875Ba0.125-xSrxCuO4 are studied using synchrotron x-ray diffraction for x=0.05 and x=0.075. The propagation wave-vector and charge order correlation lengths are determined with a high accuracy, revealing that the oblique charge stripes in orthorhombic x=0.075 crystal are more disordered than the aligned stripes in tetragonal x=0.05 crystal. The twofold periodicity of lattice modulations along the c axis is explained by long-range Coulomb interactions between holes on neighboring CuO2 planes.
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