Weyl Monoloop Semi-Half-Metal and Tunable Anomalous Hall Effect

Nodal monoloop, enjoying the cleanest scenario with a single loop, is recognized as the basic building block of intricate linked loops including chains, nets, and knots. Here, we explore the interplay of magnetic ordering and band topology in one system by introducing a brand-new quantum state, refe...

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Bibliographic Details
Published in:Nano letters 2021-10, Vol.21 (20), p.8749-8755
Main Authors: Zhang, Run-Wu, Zhou, Xiaodong, Zhang, Zeying, Ma, Da-Shuai, Yu, Zhi-Ming, Feng, Wanxiang, Yao, Yugui
Format: Article
Language:English
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Summary:Nodal monoloop, enjoying the cleanest scenario with a single loop, is recognized as the basic building block of intricate linked loops including chains, nets, and knots. Here, we explore the interplay of magnetic ordering and band topology in one system by introducing a brand-new quantum state, referred to as Weyl monoloop semi-half-metal, which is characterized by a single loop at the Fermi level stemming from the same spin channel. Such a nodal line Fermion, yielding 100% spin polarization, is protected by mirror ( M z ) symmetry. As a prominent example, a realistic rutile-type metal fluorides LiV2F6 achieves the hitherto unmaterialized state, featuring fully spin-polarized ultraflat surface states. More interestingly, LiV2F6 has a “soft” ferromagnetic property, which is one of the desired systems to control the anomalous Hall effect by rotating the magnetization direction. Our findings offer a promising candidate for exploring the topology and magnetism with intriguing effects.
ISSN:1530-6984
1530-6992
DOI:10.1021/acs.nanolett.1c02968