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

作　　者：Xiao-Lin Wang 

机构地区：[1]Spintronic and Electronic Materials Group,Institute for Superconducting and Electronic Materials,Australian Institute for Innovative Materials,University of Wollongong,NSW 2500,Australia

出　　处：《National Science Review》2017年第2期252-257,共6页国家科学评论（英文版）

基　　金：support from the Australian Research Council(ARC) through an ARC Discovery Project(DP130102956);an ARC Professorial Future Fellowship project(FT130100778)

摘　　要：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 efects 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 efect measurements, but with vanishing Hall voltage. hese new Hall efects can be classiied as(quantum) anomalous spin Hall efects. he physics for massless and dissipationless spintronics and the new spin Hall efects 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 latices.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 efects 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 efect measurements, but with vanishing Hall voltage. hese new Hall efects can be classiied as（quantum） anomalous spin Hall efects. he physics for massless and dissipationless spintronics and the new spin Hall efects 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 latices.

关 键 词：SPINTRONICS spin-gapless materials spin Hall efects 

分 类 号：TN304[电子电信—物理电子学]