Electronically phase-separated charge-density waves in Lu 2Ir3Si5

M. H. Lee, C. H. Chen, M. W. Chu, C. S. Lue, Y. K. Kuo

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    16 Citations (Scopus)

    Abstract

    We report the investigation of charge density waves (CDW's) in Lu 2Ir3Si5 by electron diffraction and dark-field imaging in transmission electron microscopy using superlattice diffraction spots. The CDW state is confirmed by the presence of superlattice reflections. Most interestingly, the CDW state at low temperatures is found to be electronically phase separated, with the coexistence of CDW domains and low-temperature normal phase domains. With a change in temperature, unlike other typical incommensurate CDW systems in which commensurability varies with temperature, we find that commensurability remains unchanged in the present case and that the predominant change is in the redistribution of the area ratio of the two coexisting phases, which is clearly revealed in the dark-field images obtained from the CDW superlattice reflections. The electronic phase separation in the CDW state of Lu2Ir3Si5 is unprecedented in CDW systems, and its temperature dependence is also anomalous.

    Original languageEnglish
    Article number155121
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume83
    Issue number15
    DOIs
    Publication statusPublished - 2011 Apr 26

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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