Experimental Evidence for Static Charge Density Waves in Iron Oxypnictides

A. Martinelli, P. Manfrinetti, A. Provino, Alessandro Genovese, F. Caglieris, G. Lamura, C. Ritter, M. Putti

    Research output: Contribution to journalArticlepeer-review

    10 Scopus citations

    Abstract

    In this Letter we report high-resolution synchrotron x-ray powder diffraction and transmission electron microscope analysis of Mn-substituted LaFeAsO samples, demonstrating that a static incommensurate modulated structure develops across the low-temperature orthorhombic phase, whose modulation wave vector depends on the Mn content. The incommensurate structural distortion is likely originating from a charge-density-wave instability, a periodic modulation of the density of conduction electrons associated with a modulation of the atomic positions. Our results add a new component in the physics of Fe-based superconductors, indicating that the density wave ordering is charge driven.
    Original languageEnglish (US)
    JournalPhysical Review Letters
    Volume118
    Issue number5
    DOIs
    StatePublished - Jan 31 2017

    Fingerprint Dive into the research topics of 'Experimental Evidence for Static Charge Density Waves in Iron Oxypnictides'. Together they form a unique fingerprint.

    Cite this