Synthesis of a predicted layered LiB via cold compression

A. N. Kolmogorov, S. Hajinazar, C. Angyal, V. L. Kuznetsov, A. P. Jephcoat

    Research output: Contribution to journalArticlepeer-review

    13 Citations (Scopus)

    Abstract

    We have discovered stoichiometric LiB with hexagonal boron layers by compressing known LiB0.9 with linear boron chains. The sp to sp2 rebonding occurred at room temperature and pressures above 21 GPa. The study was motivated by a long-standing prediction that LiB in the stable layered configuration could be a close analog to the MgB2 superconductor. Apparent stacking disorder in LiB and a stoichiometry shift in LiBy (down to y≈0.75) made material characterization a challenge. Ab initio modeling allowed us to establish the pressure-dependent composition of LiBy and predict related stable structures overlooked in previous studies. Synchrotron powder diffraction data on quenched samples in the diamond anvil cell indicate that LiB remains metastable at ambient pressure.

    Original languageEnglish
    Article number144110
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume92
    Issue number14
    DOIs
    Publication statusPublished - Oct 29 2015

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

    Fingerprint

    Dive into the research topics of 'Synthesis of a predicted layered LiB via cold compression'. Together they form a unique fingerprint.

    Cite this