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Incommensurate sinusoidal oxygen modulations in layered manganites La1-xSr1+xMnO4 (x≥0.5)

AuthorsGarcía, Joaquín CSIC ORCID; Herrero Martín, Javier CSIC ORCID; Subías, G. CSIC ORCID; Blasco, Javier CSIC ORCID; Andreu, J. S.; Sánchez, María Concepción CSIC ORCID
Issue Date2012
PublisherAmerican Physical Society
CitationPhysical Review Letters 109(10): 107202 (2012)
AbstractWe have studied the incommensurate-ordered phase in overdoped La 0.4Sr 1.6MnO 4 by resonant x-ray diffraction at the Mn K edge. Weak resonant superlattice (h±0.2h±0.20) and (h±0.4h±0.40) reflections of the tetragonal structure were found below ∼240K. The energy, azimuth angle, and polarization dependencies of the resonant scattering have revealed sinusoidal modulations of the oxygen motions that are transverse and longitudinal to the tetragonal [110] direction. This result discards (Mn3 +,Mn4 +)-like stripe-type order but point to a charge-density-modulation picture. © 2012 American Physical Society.
Identifiersdoi: 10.1103/PhysRevLett.109.107202
issn: 0031-9007
e-issn: 1079-7114
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