期刊
NATIONAL SCIENCE REVIEW
卷 4, 期 2, 页码 252-257出版社
OXFORD UNIV PRESS
DOI: 10.1093/nsr/nww069
关键词
spintronics; spin-gapless materials; spin Hall effects
资金
- Australian Research Council (ARC) through an ARC Discovery Project [DP130102956]
- ARC Professorial Future Fellowship [FT130100778]
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 formassless 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.
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