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Bulk charge stripe order competing with superconductivity in La2-xSrxCuO4 (x=0.12)

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arxiv 1404.3192 v1 pith:GQHEAPEZ submitted 2014-04-11 cond-mat.supr-con cond-mat.str-el

classification cond-mat.supr-concond-mat.str-el
keywords bulkchargela2-xsrxcuo4orderstripesuperconductivityappliedargue
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We present a volume-sensitive high-energy x-ray diffraction study of the underdoped cuprate high temperature superconductor La2-xSrxCuO4 (x = 0.12, Tc=27 K) in applied magnetic field. Bulk short-range charge stripe order with propagation vector q_ch = (0.231, 0, 0.5) is demonstrated to exist below T_ch = 85(10) K and shown to compete with superconductivity. We argue that bulk charge ordering arises from fluctuating stripes that become pinned near boundaries between orthorhombic twin domains.

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  1. Anomalous Dispersion of LO Phonons in Oxygen-Doped La$_{2-x}$Sr$_{x}$CuO$_{4+\delta}$

    cond-mat.supr-con 2019-08 conditional novelty 6.0 of 10

    The Cu-O bond-stretching phonon anomaly previously seen in Sr-doped LSCO also appears in oxygen-doped La2CuO4+δ and co-doped LSCO6+O, is insensitive to a 10 T field, and points to dynamic charge stripe fluctuations.

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