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Magnetization-direction tunable nodal-line and Weyl phases

Zhang, Zeying and Gao, Qiang and Liu, Cheng-Cheng and Zhang, Hongbin and Yao, Yugui (2018):
Magnetization-direction tunable nodal-line and Weyl phases.
98, In: Physical Review B, (12), American Physical Society, pp. 121103(R), ISSN 2469-9950, DOI: 10.1103/PhysRevB.98.121103,
[Online-Edition: https://doi.org/10.1103/PhysRevB.98.121103],
[Article]

Abstract

We propose a spinless symmetry-based three-band tight-binding model with the coexistence of nodal-line and Weyl points, after considering spin-orbital coupling and different magnetization directions. It is confirmed that the number of Weyl points and nodal lines can be tuned by the magnetization direction. The combination of time-reversal symmetry and mirror reflection symmetry plays a crucial role in protecting the degeneracy of nodal lines. Moreover, we put forward a different class of materials C4CrX3 (X=Ge and Si) which host such a nontrivial semimetallic phase.

Item Type: Article
Erschienen: 2018
Creators: Zhang, Zeying and Gao, Qiang and Liu, Cheng-Cheng and Zhang, Hongbin and Yao, Yugui
Title: Magnetization-direction tunable nodal-line and Weyl phases
Language: English
Abstract:

We propose a spinless symmetry-based three-band tight-binding model with the coexistence of nodal-line and Weyl points, after considering spin-orbital coupling and different magnetization directions. It is confirmed that the number of Weyl points and nodal lines can be tuned by the magnetization direction. The combination of time-reversal symmetry and mirror reflection symmetry plays a crucial role in protecting the degeneracy of nodal lines. Moreover, we put forward a different class of materials C4CrX3 (X=Ge and Si) which host such a nontrivial semimetallic phase.

Journal or Publication Title: Physical Review B
Volume: 98
Number: 12
Publisher: American Physical Society
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Theory of Magnetic Materials
Date Deposited: 12 Dec 2018 10:19
DOI: 10.1103/PhysRevB.98.121103
Official URL: https://doi.org/10.1103/PhysRevB.98.121103
Funders: The work is supported by the National Key R&D Program of China (Grant No. 2016YFA0300600), The work is supported by the NSF of China (Grants No. 11734003, No. 11574029, and No. 11774028), and also the Basic Research Funds of Beijing Institute of Technology (No. 2017CX01018)., H.Z. acknowledges the financial support of the DFG-SPP 1666 program, and both Z.Z. and Q.G. are supported by the CSC scholarship.
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