X-Ray Diffraction from Pinned Charge Density Waves

Details X-Ray Diffraction from Pinned Charge Density Waves X-Ray Diffraction from Pinned Charge Density Waves

1999-11-06

arxiv.org/abs/cond-mat/9911097v1

Physics

Condensed Matter

To be published in Proceedings of ECRYS-99, J. de Physique, Coll., December 1999. http://www.lps.u-psud.fr/physol/Organisation

Scientific paper

We present an x-ray study of doped charge density waves systems. When a 2k_f-charge density wave is strongly pinned to impurities, an interference effect gives rise to an asymmetry between the intensities of the +2k_f and -2k_f satellite reflections. Moreover, profile asymmetry of the satellite reflections indicates the existence of Friedel oscillations (FOs) around the defects. We have studied these effects in V- and W-doped blue bronzes. A syncrotron radiation study of the V-doped blue bronze clearly reveals the presence of FO around the V atoms.

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