Half-Heusler ternary compounds as new multifunctional experimental platforms for topological quantum phenomena

Hsin Lin, L. Andrew Wray, Yuqi Xia, Suyang Xu, Shuang Jia, Robert J. Cava, Arun Bansil, M. Zahid Hasan

    Research output: Contribution to journalArticle

    Abstract

    Recent discovery of spin-polarized single-Dirac-cone1-6 insulators7-12, whose variants can host magnetism and superconductivity14, has generated widespread research activity in condensed-matter and materials-physics communities. Some of the most interesting topological phenomena, however, require topological insulators to be placed in multiply connected, highly constrained geometries with magnets and superconductors15-21, all of which thus require a large number of functional variants with materials design flexibility as well as electronic, magnetic and superconducting tunability. Given the optimum materials, topological properties open up new vistas in spintronics, quantum computing and fundamental physics. We have extended the search for topological insulators from the binary Bi-based2-6 series to the ternary thermoelectric Heusler compounds22-25. Here we show that, although a large majority of the well-known Heuslers such as TiNiSn and LuNiBi are rather topologically trivial, the distorted LnPtSb-type (such as LnPtBi or LnPdBi, Ln=fn lanthanides) compounds belonging to the half-Heusler subclass harbour Z 2=-'1 topological insulator parent states, where Z2 is the band purity product index. Our results suggest that half-Heuslers provide a new platform for deriving a host of topologically exotic compounds and their nanoscale or thin-film device versions through the inherent flexibility of their lattice parameter, spin-orbit strength and magnetic moment tunability paving the way for the realization of multifunctional topological devices.

    Original languageEnglish (US)
    Pages (from-to)546-549
    Number of pages4
    JournalNature Materials
    Volume9
    Issue number7
    DOIs
    StatePublished - Jul 2010

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    Physics
    platforms
    insulators
    Thin film devices
    Lanthanoid Series Elements
    Magnetoelectronics
    flexibility
    Magnetism
    Ports and harbors
    Magnetic moments
    Rare earth elements
    Lattice constants
    Magnets
    Materials properties
    Orbits
    physics
    harbors
    quantum computation
    Geometry
    lattice parameters

    ASJC Scopus subject areas

    • Mechanical Engineering
    • Mechanics of Materials
    • Condensed Matter Physics
    • Materials Science(all)
    • Chemistry(all)

    Cite this

    Half-Heusler ternary compounds as new multifunctional experimental platforms for topological quantum phenomena. / Lin, Hsin; Wray, L. Andrew; Xia, Yuqi; Xu, Suyang; Jia, Shuang; Cava, Robert J.; Bansil, Arun; Hasan, M. Zahid.

    In: Nature Materials, Vol. 9, No. 7, 07.2010, p. 546-549.

    Research output: Contribution to journalArticle

    Lin, H, Wray, LA, Xia, Y, Xu, S, Jia, S, Cava, RJ, Bansil, A & Hasan, MZ 2010, 'Half-Heusler ternary compounds as new multifunctional experimental platforms for topological quantum phenomena', Nature Materials, vol. 9, no. 7, pp. 546-549. https://doi.org/10.1038/nmat2771
    Lin, Hsin ; Wray, L. Andrew ; Xia, Yuqi ; Xu, Suyang ; Jia, Shuang ; Cava, Robert J. ; Bansil, Arun ; Hasan, M. Zahid. / Half-Heusler ternary compounds as new multifunctional experimental platforms for topological quantum phenomena. In: Nature Materials. 2010 ; Vol. 9, No. 7. pp. 546-549.
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