Large anomalous Hall current induced by topological nodal lines in a ferromagnetic van der Waals semimetal

Nature Materials
Kyoo KimJun Sung Kim

Abstract

Topological semimetals host electronic structures with several band-contact points or lines and are generally expected to exhibit strong topological responses. Up to now, most work has been limited to non-magnetic materials and the interplay between topology and magnetism in this class of quantum materials has been largely unexplored. Here we utilize theoretical calculations, magnetotransport and angle-resolved photoemission spectroscopy to propose Fe3GeTe2, a van der Waals material, as a candidate ferromagnetic (FM) nodal line semimetal. We find that the spin degree of freedom is fully quenched by the large FM polarization, but the line degeneracy is protected by crystalline symmetries that connect two orbitals in adjacent layers. This orbital-driven nodal line is tunable by spin orientation due to spin-orbit coupling and produces a large Berry curvature, which leads to a large anomalous Hall current, angle and factor. These results demonstrate that FM topological semimetals hold significant potential for spin- and orbital-dependent electronic functionalities.

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Citations

Aug 2, 2019·Nanotechnology·Kangwon KimHyeonsik Cheong
Sep 15, 2019·Scientific Reports·Yu LiuCedomir Petrovic
Jul 12, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Inho HwangJe-Geun Park
Oct 28, 2019·Nature Communications·Linda YeJoseph G Checkelsky
Jul 20, 2019·Nature Communications·Chengwang NiuYuriy Mokrousov
Jun 8, 2019·Physical Review Letters·Dong-Hwan KimJae-Hoon Park
Sep 15, 2020·Advanced Materials·Yu WangFeng Miao
Sep 19, 2020·Scientific Reports·R OkumaY Okada
Aug 25, 2018·Nature Materials·D A Pesin
Jan 25, 2020·Physical Review Letters·Pascal PuphalJonathan S White
Aug 2, 2020·Nature Communications·Yingying WuKang L Wang
Jun 20, 2020·Nanoscale·Seung Woo JangMyung Joon Han
Feb 12, 2021·Nano Letters·Hyung Keun GweonJun Woo Choi
Nov 6, 2020·Chemical Reviews·Nitesh KumarClaudia Felser
Nov 10, 2020·Chemical Reviews·Yoshinori Tokura, Naoya Kanazawa
Apr 8, 2021·Nature Communications·Archana TiwariAdam W Tsen
May 16, 2021·Nature Communications·Junho SeoJun Sung Kim
May 27, 2021·Nature Communications·Man LiShancai Wang
Jul 10, 2021·Scientific Reports·Rajeswari Roy ChowdhuryRavi Prakash Singh
Jul 27, 2021·ACS Applied Materials & Interfaces·Dongzhe LiJunjie He
Dec 31, 2019·Nano Letters·Jeongwoo KimNoejung Park
Apr 30, 2019·The Journal of Physical Chemistry Letters·Hongbo WuYugui Yao
Oct 30, 2019·Nano Letters·Jinsong XuChia-Ling Chien
Aug 21, 2021·Nature Materials·Jonathan GaudetCollin L Broholm
Apr 25, 2020·Nano Letters·Pawan Kumar SrivastavaChanggu Lee

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Methods Mentioned

BETA
scanning tunnelling microscopy

Software Mentioned

WIEN2K
FPLO

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