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We report the results of elastic neutron scattering measurements performed on1/8-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) andspin-density-wave (SDW) wavevectors were found to tilt in a low-symmetricdirection with one-dimensional anisotropy in the CuO$_{2}$ plane, while theywere aligned along the high-symmetry axis in the low-temperature tetragonal(LTT, {\it P}4$_2$/{\it ncm} symmetry) phase. The coincident direction of twowavevectors suggests a close relation between CDW and SDW orders. The SDWwavevector systematically deviates from the Cu-O bond direction in the LTLOphase upon Sr substitution and the tilt angle in the LTLO phase is smaller thanthat in the low-temperature orthorhombic phase (LTO, {\it B}{\it mab} symmetry)with comparable in-plane orthorhombic distortion. These results demonstrate acorrelation between the corrugated pattern of CuO$_{2}$ plane and thedeviations.

physical review. b, condensed matter

Structural effect on the static spin and charge correlations in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">La</mml:mi></mml:mrow><mml:mrow><mml:mn>1.875</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ba</mml:mi></mml:mrow><mml:mrow><mml:mn>0.125</mml:mn><mml:mi>−</mml:mi><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml…

Structural effect on the static spin and charge correlations inLa1.875Ba0.125−x