Hydrostatic pressure-induced anomalous hall effect in Co2FeSi semimetal

Author:

Sau JyotirmoyORCID,Sa Debanand,Kumar ManoranjanORCID

Abstract

Abstract The Weyl points and nodal line emerge in the momentum space due to symmetry protected state in topological semimetal materials and these materials hold significance due to their unusual anomalous transport properties. In this manuscript, we study the topological properties of the electronic band structure of a half-metallic ferromagnet Co2FeSi employing the ab-initio density functional theory method and show that it is a strongly correlated material. The experimentally observed magnetic properties can be explained in terms of the Slater–Pauling (SP) rule and our calculations are consistent with it. We also investigate the band topology of Co2FeSi and find that there are three topological nodal lines at 380 meV above Fermi Energy (E F ). The degeneracy of these nodal lines is perturbed upon introducing spin–orbit coupling with magnetization along [001] direction. However, some points still preserve degeneracy and are identified as Weyl points, each associated with a specific Chern number. At the ambient pressure, the AHC properties of this material have only extrinsic contribution which is consistent with the experimental results. To make the AHC intrinsic, we tune the position of the nodal line close to the Fermi energy by applying the hydrostatic pressure up to 26 GPa. We also discuss crystal symmetries and their relation with nodal lines and Weyl points.

Publisher

IOP Publishing

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3