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Dirac spin-gapless semiconductors: promising platforms for massless and dissipationless spintronics and new (quantum) anomalous spin Hall effects

Journal Article


Abstract


  • It is proposed that the new generation of spintronics should be ideally massless and dissipationless for the

    realization of ultra-fast and ultra-low-power spintronic devices. We demonstrate that the spin-gapless

    materials with linear energy dispersion are unique materials that can realize these massless and

    dissipationless states. Furthermore, we propose four new types of spin Hall effects that consist of spin

    accumulation of equal numbers of electrons and holes having the same or opposite spin polarization at the

    sample edge in Hall effect measurements, but with vanishing Hall voltage. These new Hall effects can be

    classified as (quantum) anomalous spin Hall effects. The physics for massless and dissipationless spintronics

    and the new spin Hall effects are presented for spin-gapless semiconductors with either linear or parabolic

    dispersion. New possible candidates for Dirac-type or parabolic-type spin-gapless semiconductors are

    proposed in ferromagnetic monolayers of simple oxides with either honeycomb or square lattices.

Publication Date


  • 2017

Citation


  • Wang, X. (2017). Dirac spin-gapless semiconductors: promising platforms for massless and dissipationless spintronics and new (quantum) anomalous spin Hall effects. National Science Review, 4 (2), 252-257.

Scopus Eid


  • 2-s2.0-85019764707

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2551

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 252

End Page


  • 257

Volume


  • 4

Issue


  • 2

Place Of Publication


  • United Kingdom

Abstract


  • It is proposed that the new generation of spintronics should be ideally massless and dissipationless for the

    realization of ultra-fast and ultra-low-power spintronic devices. We demonstrate that the spin-gapless

    materials with linear energy dispersion are unique materials that can realize these massless and

    dissipationless states. Furthermore, we propose four new types of spin Hall effects that consist of spin

    accumulation of equal numbers of electrons and holes having the same or opposite spin polarization at the

    sample edge in Hall effect measurements, but with vanishing Hall voltage. These new Hall effects can be

    classified as (quantum) anomalous spin Hall effects. The physics for massless and dissipationless spintronics

    and the new spin Hall effects are presented for spin-gapless semiconductors with either linear or parabolic

    dispersion. New possible candidates for Dirac-type or parabolic-type spin-gapless semiconductors are

    proposed in ferromagnetic monolayers of simple oxides with either honeycomb or square lattices.

Publication Date


  • 2017

Citation


  • Wang, X. (2017). Dirac spin-gapless semiconductors: promising platforms for massless and dissipationless spintronics and new (quantum) anomalous spin Hall effects. National Science Review, 4 (2), 252-257.

Scopus Eid


  • 2-s2.0-85019764707

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2551

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 252

End Page


  • 257

Volume


  • 4

Issue


  • 2

Place Of Publication


  • United Kingdom