Phase diagram of charge order in La1.8-xEu0.2SrxCuO4 from resonant soft x-ray diffraction

Details Phase diagram of charge order in La1.8-xEu0.2SrxCuO4 from resonant soft x-ray diffraction Phase diagram of charge order in La1.8-xEu0.2SrxCuO4 from resonant soft x-ray diffraction

2010-11-23

arxiv.org/abs/1011.5101v1

Phys. Rev. B 83, 092503 (2011)

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

Resonant soft x-ray scattering experiments with photon energies near the O K and the Cu L3 edge on the system La1.8-xEu0.2SrxCuO4 for 0.1 <= x <= 0.15 are presented. A phase diagram for stripe-like charge ordering is obtained together with information on the structural transition into the low-temperature tetragonal phase. A clear dome for the charge ordering around x = 1/8 is detected well below the structural transition. This result is quite different from other systems in which static stripes are detected. There the charge order is determined by the structural transition appearing at the same temperature. Furthermore we present results for the coherence length and the incommensurability of the stripe order as a function of Sr concentration.

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