科技工作者之家
科界APP是专注科技人才,知识分享与人才交流的服务平台。
科技工作者之家 2019-11-29
来源:知社学术圈
磁性拓扑半金属是一种破坏时间反演对称性,在费米能级附近具有孤立简并点或简并线的新型拓扑量子材料。在其表面具有自旋极化的费米弧或鼓膜态等拓扑稳定的边界态。因其独特的输运特性以及在自旋电子器件中的应用前景,磁性拓扑半金属的材料预测与合成是近年来广受关注的热点问题。
来自华中科技大学的徐刚研究组长期从事磁性拓扑半金属的理论和计算研究。在本篇综述文章中,他们从磁性空间群与第一性原理计算的角度,纵览了磁性拓扑半金属包括外尔半金属、狄拉克半金属和节点线半金属材料预测的最新进展。首先回顾了早期预言的磁性外尔半金属如烧绿石铱氧化物和HgCr2Se4,以及最近提出的Heusler化合物,Kagome层状材料,蜂巢格子GdSI等。其次讨论了受第三类磁空间群保护的CuMnAs和受第四类磁空间群保护的EuCd2As2两种磁性狄拉克半金属。之后介绍了在自旋轨道耦合作用下依然稳定的磁性节点线半金属Fe3GeTe2和LaCl(LaBr)。最后展望了磁性拓扑半金属未来的发展和研究方向。
该文近期发表于npj Computational Materials 5: 96 (2019),英文标题与摘要如下,点击左下角“阅读原文”可以自由获取论文PDF。
The study of magnetic topological semimetals by first principles calculations
Jinyu Zou, Zhuoran He & Gang Xu
Magnetic topological semimetals (TSMs) are topological quantum materials with broken time-reversal symmetry (TRS) and isolated nodal points or lines near the Fermi level. Their topological properties would typically reveal from the bulk-edge correspondence principle as nontrivial surface states such as Fermi arcs or drumhead states, etc. Depending on the degeneracies and distribution of the nodes in the crystal momentum space, TSMs are usually classified into Weyl semimetals (WSMs), Dirac semimetals (DSMs), nodal-line semimetals (NLSMs), triple-point semimetals (TPSMs), etc. In this review article, we present the recent advances of magnetic TSMs from a computational perspective. We first review the early predicted magnetic WSMs such as pyrochlore iridates and HgCr2Se4, as well as the recently proposed Heusler, Kagome layers, and honeycomb lattice WSMs. Then we discuss the recent developments of magnetic DSMs, especially CuMnAs in Type-III and EuCd2As2 in Type-IV magnetic space groups (MSGs). Then we introduce some magnetic NLSMs that are robust against spin–orbit coupling (SOC), namely Fe3GeTe2 and LaCl (LaBr). Finally, we discuss the prospects of magnetic TSMs and the interesting directions for future research.
来源:zhishexueshuquan 知社学术圈
原文链接:https://mp.weixin.qq.com/s?__biz=MzIwMjk1OTc2MA==&mid=2247500540&idx=3&sn=5b78623c4a91fd7aa0c2470a918af2f8&chksm=96d43c03a1a3b515285b8ab042335c8a48b7377608a8dd5ef8c6a83ac21fe02f5cd9f066b978#rd
版权声明:除非特别注明,本站所载内容来源于互联网、微信公众号等公开渠道,不代表本站观点,仅供参考、交流、公益传播之目的。转载的稿件版权归原作者或机构所有,如有侵权,请联系删除。
电话:(010)86409582
邮箱:kejie@scimall.org.cn
宁波材料所等在铁磁性Ru金属团簇的原位构造及催化应用方面获进展
察觉不到的快!新材料瞬间从水中去除重金属
磁性乐高:揭秘二维磁性材料的层间磁性耦合方式|Science述评
透明太阳能技术:引领未来浪潮
低维磁性材料
新型磁性二维材料Fe3GeTe2及其室温磁性调控
磁性记忆材料
兰州化物所金属有机框架衍生化磁性碳萃取材料研究取得新进展
殷亚东教授揭示非贵金属等离子激元/磁性纳米材料用于高效太阳能蒸发
磁性超导材料