Structural effect on the static spin and charge correlations in La${}_{1.875}$Ba${}_{0.125-x}$Sr${}_x$CuO${}_4$

Abstract

We report the results of elastic neutron scattering measurements performed on 1/8-hole doped La${}_{1.875}$Ba${}_{0.125-x}$Sr${}_x$CuO${}_4$ single crystals with {\it x}=0.05, 0.06, 0.075 and 0.085. In the low-temperature less-orthorhombic (LTLO, {\it Pccn} symmetry) phase, the charge-density-wave (CDW) and spin-density-wave (SDW) wavevectors were found to tilt in a low-symmetric direction with one-dimensional anisotropy in the CuO${}_2$ plane, while they were aligned along the high-symmetry axis in the low-temperature tetragonal (LTT, {\it P}4${}_2$/{\it ncm} symmetry) phase. The coincident direction of two wavevectors suggests a close relation between CDW and SDW orders. The SDW wavevector systematically deviates from the Cu-O bond direction in the LTLO phase upon Sr substitution and the tilt angle in the LTLO phase is smaller than that in the low-temperature orthorhombic phase (LTO, {\it B}{\it mab} symmetry) with comparable in-plane orthorhombic distortion. These results demonstrate a correlation between the corrugated pattern of CuO${}_2$ plane and the deviations.

6 pages, 7figures

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• Dynamical Properties of Charged Stripes in La_{2-x}Sr_xCuO_4
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• Normal-state conductivity in underdoped La_{2-x}Sr_xCuO_4 thin films: Search for nonlinear effects related to collective stripe motion
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• Synchrotron X-ray diffraction study of a charge stripe order in 1/8-doped La${}_{1.875}$Ba${}_{0.125-x}$Sr${}_x$CuO${}_4$
• Theory of reduced singlet pairing without the underlying state of charge stripes in the high-temperature superconductor YBa_2Cu_3O_6.45
• Magnetic field dependence of charge stripe order in La2-xBaxCuO4 (x~1/8)
• Effective action, magnetic excitations and quantum fluctuations in lightly doped single layer cuprates
• Effects of Superconductivity and Charge Order on the sub-Terahertz reflectivity of La${}_{1.875}$Ba${}_{0.125-y}$Sr${}_y$CuO${}_4$
• Tilted stripes origin in ${\mathrm{La}}_{1.88}{\mathrm{Sr}}_{0.12}{\mathrm{CuO}}_4$ revealed by anisotropic next-nearest neighbor hopping
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• Interacting Electrons on a Fluctuating String
• Metallic State of the Three-band Hubbard Model with Super-lattice Structure
• Phase diagram of La2-xSrxCuO4 and stripes