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Spontaneous Symmetry Breaking by Charge Stripes in the High Pressure Phase of Superconducting<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>La</mml:mi><mml:mn>1.875</mml:mn></mml:msub><mml:msub><mml:mi>Ba</mml:mi><mml:mn>0.125</mml:mn></mml:msub><mml:msub><mml:mi>CuO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>
In those cases where charge-stripe order has been observed in cuprates, the crystal structure is such that the average rotational symmetry of the ${\mathrm{CuO}}_{2}$ planes is reduced from fourfold to twofold. As a result, one could argue that the reduced lattice symmetry is essential to the existence of stripe order. …