Impact of lithium-ion ordering on surface electronic states of Li xCoO2

K. Iwaya, T. Ogawa, T. Minato, K. Miyoshi, J. Takeuchi, A. Kuwabara, H. Moriwake, Y. Kim, T. Hitosugi

    Research output: Contribution to journalArticlepeer-review

    27 Citations (Scopus)

    Abstract

    LixCoO2 exhibits intriguing electronic properties due to a strong electron correlation and complex interplay between Co and Li ions However, fundamental understanding of the nanoscale distribution of Li ions and its effect on the electronic properties remains unclear We use scanning tunneling microscopy and density functional theory to elucidate the degree of LixCoO2 surface electronic state modification that can be achieved by Li ordering The surface Li ions are highly mobile and preferentially form a (1×1) hexagonal lattice, whereas the surface CoO2 layer shows metallic and insulating phases, indicating the coexistence of ordered and disordered Li ions in the subsurface layer These results provide evidence of novel electronic properties produced by spatially inhomogeneous Li-ordering patterns

    Original languageEnglish
    Article number126104
    JournalPhysical review letters
    Volume111
    Issue number12
    DOIs
    Publication statusPublished - 2013 Sep 18

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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