Recent advances in Dirac spin-gapless semiconductors

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.

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Spin transport properties in Dirac spin gapless semiconductors Cr2X3 with high Curie temperature and large magnetic anisotropic energy

Applied Physics Letters ◽

10.1063/5.0045262 ◽

2021 ◽

Vol 118 (11) ◽

pp. 112407

Author(s):

Yulin Feng ◽

Na Liu ◽

Guoying Gao

Keyword(s):

Curie Temperature ◽

Transport Properties ◽

Spin Transport ◽

High Curie Temperature ◽

Anisotropic Energy ◽

Spin Gapless Semiconductors ◽

Dirac Spin

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Recent advances in the Heusler based spin-gapless semiconductors

Journal of Materials Chemistry C ◽

10.1039/c6tc01343k ◽

2016 ◽

Vol 4 (30) ◽

pp. 7176-7192 ◽

Cited By ~ 92

Author(s):

Xiaotian Wang ◽

Zhenxiang Cheng ◽

Jianli Wang ◽

Xiao-Lin Wang ◽

Guodong Liu

Keyword(s):

Heusler Compounds ◽

Recent Advances ◽

Full Heusler ◽

Spin Gapless Semiconductors

In this work, we review the progress on the Heusler-based materials with spin-gapless semiconducting behaviour, including half-Heusler compounds, full-Heusler compounds, DO3-type compounds, and LiMgPdSn-type quaternary Heusler compounds.

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Robust Dirac spin gapless semiconductors in a two-dimensional oxalate based organic Honeycomb-Kagome lattice

Nanoscale ◽

10.1039/d1nr07076b ◽

2022 ◽

Author(s):

Jianpei Xing ◽

Xue Jiang ◽

Zhifeng Liu ◽

Yan Qi ◽

Jijun Zhao

Keyword(s):

Ab Initio Calculations ◽

Ab Initio ◽

Ferromagnetic Materials ◽

Two Dimensional ◽

Dirac Cone ◽

Spintronic Devices ◽

Kagomé Lattice ◽

Spin Polarized ◽

Spin Gapless Semiconductors ◽

Dirac Spin

Two-dimensional (2D) ferromagnetic materials with intrinsic and robust spin-polarized Dirac cone are of great interest to explore exciting physics and to realize spintronic devices. Using comprehensive ab initio calculations, herein...

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Recent Advances in High Dispersion Spectroscopy of Globular Cluster Stars

Symposium - International Astronomical Union ◽

10.1017/s0074180900035610 ◽

1988 ◽

Vol 132 ◽

pp. 525-530

Author(s):

Raffaele G. Gratton

Keyword(s):

Globular Cluster ◽

Globular Clusters ◽

High Dispersion ◽

Photographic Material ◽

Recent Advances ◽

Metal Abundances ◽

Ccd Detectors ◽

Major Progress

The use CCD detectors has allowed a major progress in abundance derivations for globular cluster stars in the last years. Abundances deduced from high dispersion spectra now correlates well with other abundance indicators. I discuss some problems concerning the derivation of accurate metal abundances for globular clusters using high dispersion spectra from both the old photographic and the most recent CCD data. The discrepant low abundances found by Cohen (1980), from photographic material for M71 giants, are found to be due to the use of too high microturbulences.

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Chelation-assisted transition metal-catalysed C–H chalcogenylations

Organic Chemistry Frontiers ◽

10.1039/c9qo01497g ◽

2020 ◽

Vol 7 (8) ◽

pp. 1022-1060 ◽

Cited By ~ 7

Author(s):

Wenbo Ma ◽

Nikolaos Kaplaneris ◽

Xinyue Fang ◽

Linghui Gu ◽

Ruhuai Mei ◽

...

Keyword(s):

Transition Metal ◽

Recent Advances ◽

Site Selectivity ◽

Transition Metal Catalyzed ◽

Metal Catalyzed

This review summarizes recent advances in C–S and C–Se formations via transition metal-catalyzed C–H functionalization utilizing directing groups to control the site-selectivity.

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Nucleosome dynamics

Biochemical Society Symposium ◽

10.1042/bss0730109 ◽

2006 ◽

Vol 73 ◽

pp. 109-119 ◽

Cited By ~ 2

Author(s):

Chris Stockdale ◽

Michael Bruno ◽

Helder Ferreira ◽

Elisa Garcia-Wilson ◽

Nicola Wiechens ◽

...

Keyword(s):

High Resolution ◽

Chromatin Structure ◽

Current Knowledge ◽

Dynamic Properties ◽

Structure And Dynamics ◽

Nucleosome Dynamics ◽

Sharp Focus ◽

Recent Advances ◽

Insight Into ◽

Chromatin Structure And Dynamics

In the 30 years since the discovery of the nucleosome, our picture of it has come into sharp focus. The recent high-resolution structures have provided a wealth of insight into the function of the nucleosome, but they are inherently static. Our current knowledge of how nucleosomes can be reconfigured dynamically is at a much earlier stage. Here, recent advances in the understanding of chromatin structure and dynamics are highlighted. The ways in which different modes of nucleosome reconfiguration are likely to influence each other are discussed, and some of the factors likely to regulate the dynamic properties of nucleosomes are considered.

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Recent Advances in the Treatment of Pulmonary Tuberculosis

Medical Clinics of North America ◽

10.1016/s0025-7125(16)35368-8 ◽

1950 ◽

Vol 34 (5) ◽

pp. 1363-1380

Author(s):

Theodore L. Badger ◽

William E. Patton

Keyword(s):

Pulmonary Tuberculosis ◽

Recent Advances

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