Dirac charge in antiferromagnetic topological semimetals
Fuente:
arXiv
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866912862306304000 |
|---|---|
| author | Hattori, Kohei Watanabe, Hikaru Arita, Ryotaro |
| author_facet | Hattori, Kohei Watanabe, Hikaru Arita, Ryotaro |
| contents | Topological node of electronic bands can carry emergent charge degree of freedom such as the Berry curvature monopole of the Weyl semimetals, which results in intriguing transport and optical phenomena. In this study, we discuss the existence of the hidden "Dirac charge" and its detection via the photocurrent response in antiferromagnetic (AFM) Dirac semimetals. In light of the Berry curvature defined in the spin and spin-charge-mixed parameter space, we identify Dirac charges as sources or sinks of the Berry curvature in the generalized parameter space. We demonstrate that this Dirac charge can be detected via the photocurrent driven by the spin-charge-coupled motive force. By using real-time simulation, we find that the Dirac charge plays a significant role in the photocurrent generation in AFM Dirac semimetals. This work reveals the hidden property of the Dirac points in AFM Dirac semimetals. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_03191 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Dirac charge in antiferromagnetic topological semimetals Hattori, Kohei Watanabe, Hikaru Arita, Ryotaro Mesoscale and Nanoscale Physics Strongly Correlated Electrons Topological node of electronic bands can carry emergent charge degree of freedom such as the Berry curvature monopole of the Weyl semimetals, which results in intriguing transport and optical phenomena. In this study, we discuss the existence of the hidden "Dirac charge" and its detection via the photocurrent response in antiferromagnetic (AFM) Dirac semimetals. In light of the Berry curvature defined in the spin and spin-charge-mixed parameter space, we identify Dirac charges as sources or sinks of the Berry curvature in the generalized parameter space. We demonstrate that this Dirac charge can be detected via the photocurrent driven by the spin-charge-coupled motive force. By using real-time simulation, we find that the Dirac charge plays a significant role in the photocurrent generation in AFM Dirac semimetals. This work reveals the hidden property of the Dirac points in AFM Dirac semimetals. |
| title | Dirac charge in antiferromagnetic topological semimetals |
| topic | Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2505.03191 |