AC conductivity and magnetic dichroism of two-dimensional antiferromagnetic Dirac semimetals
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arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866911969505705984 |
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| author | Sepehrinia, Reza Eskandari, Siavash Qaiumzadeh, Alireza |
| author_facet | Sepehrinia, Reza Eskandari, Siavash Qaiumzadeh, Alireza |
| contents | We investigate the magneto-optical properties of two-dimensional nonsymmorphic Dirac semimetals in the presence of antiferromagnetic order. Using the Kubo formula, we calculate the conductivity tensor of two-dimensional CuMnAs, a prototype antiferromagnetic Dirac material, as a function of light frequency. From the finite-frequency conductivity tensor, we derive the dynamic dielectric function and magnetic linear dichroism, demonstrating how they are influenced by the orientation of the N{é}el order parameter. Adjusting the N{é}el vector changes both the sign and amplitude of the system's magneto-optical response. We propose that magnetic linear dichroism spectroscopy is a powerful technique for determining the orientation of the N{é}el vector. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_14465 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | AC conductivity and magnetic dichroism of two-dimensional antiferromagnetic Dirac semimetals Sepehrinia, Reza Eskandari, Siavash Qaiumzadeh, Alireza Mesoscale and Nanoscale Physics Materials Science We investigate the magneto-optical properties of two-dimensional nonsymmorphic Dirac semimetals in the presence of antiferromagnetic order. Using the Kubo formula, we calculate the conductivity tensor of two-dimensional CuMnAs, a prototype antiferromagnetic Dirac material, as a function of light frequency. From the finite-frequency conductivity tensor, we derive the dynamic dielectric function and magnetic linear dichroism, demonstrating how they are influenced by the orientation of the N{é}el order parameter. Adjusting the N{é}el vector changes both the sign and amplitude of the system's magneto-optical response. We propose that magnetic linear dichroism spectroscopy is a powerful technique for determining the orientation of the N{é}el vector. |
| title | AC conductivity and magnetic dichroism of two-dimensional antiferromagnetic Dirac semimetals |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2406.14465 |