Symmetry-enforced two-dimensional Dirac node-line semimetals

Peng-Jie Guo; Chen Peng; Zheng-Xin Liu; Kai Liu; Zhong-Yi Lu

doi:10.1088/2752-5724/aca816

Volume 2 Issue 1

March 2022

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Peng-Jie Guo, Chen Peng, Zheng-Xin Liu, Kai Liu, Zhong-Yi Lu. Symmetry-enforced two-dimensional Dirac node-line semimetals[J]. Materials Futures, 2023, 2(1): 011001. doi: 10.1088/2752-5724/aca816

Citation:

Peng-Jie Guo, Chen Peng, Zheng-Xin Liu, Kai Liu, Zhong-Yi Lu. Symmetry-enforced two-dimensional Dirac node-line semimetals[J]. Materials Futures, 2023, 2(1): 011001. doi: 10.1088/2752-5724/aca816

Peng-Jie Guo, Chen Peng, Zheng-Xin Liu, Kai Liu, Zhong-Yi Lu. Symmetry-enforced two-dimensional Dirac node-line semimetals[J]. Materials Futures, 2023, 2(1): 011001. doi: 10.1088/2752-5724/aca816

Citation:

Peng-Jie Guo, Chen Peng, Zheng-Xin Liu, Kai Liu, Zhong-Yi Lu. Symmetry-enforced two-dimensional Dirac node-line semimetals[J]. Materials Futures, 2023, 2(1): 011001. doi: 10.1088/2752-5724/aca816

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Symmetry-enforced two-dimensional Dirac node-line semimetals

Materials Futures, Volume 2, Number 1

Received Date: 2022-11-18
Accepted Date: 2022-12-02
Rev Recd Date: 2022-12-01
Publish Date: 2022-12-28

Article information

doi: 10.1088/2752-5724/aca816

1.
Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, People’s Republic of China
2.
Kavli Institute for Theoretical Sciences, University of Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
These two authors contributed equally to this work.

More Information

Corresponding author: E-mail: liuzxphys@ruc.edu.cn; E-mail: kliu@ruc.edu.cn; E-mail: zlu@ruc.edu.cn

Abstract

Abstract

Based on symmetry analysis and lattice model calculations, we demonstrate that Dirac nodal line (DNL) can stably exist in two-dimensional (2D) nonmagnetic as well as antiferromagnetic systems. We focus on the situations where the DNLs are enforced by certain symmetries and the degeneracies on the DNLs are inevitable even if spin-orbit coupling is strong. After thorough analysis, we find that five space groups, namely 51, 54, 55, 57 and 127, can enforce the DNLs in 2D nonmagnetic semimetals, and four type-III magnetic space groups (51.293, 54.341, 55.355, 57.380) plus eight type-IV magnetic space groups (51.299, 51.300, 51.302, 54.348, 55.360, 55.361, 57.387 and 127.396) can enforce the DNLs in 2D antiferromagnetic semimetals. By breaking these symmetries, the different 2D topological phases can be obtained. Furthermore, by the first-principles electronic structure calculations, we predict that monolayer YB₄C₄ is a good material platform for studying the exotic properties of 2D symmetry-enforced Dirac node-line semimetals.
- symmetry-enforced,
- Dirac nodal line semimetals,
- nonsymmorphic space group,
- antiferromagnetic systems

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References(24)

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