Antiferromagnetic order in a layered magnetic topological insulator MnBi$_2$Se$_4$ probed by resonant soft x-ray scattering
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arXiv
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866914820816633856 |
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| author | Chen, Xiang Ruiz, Alejandro Bishop, Alexander J. Gunn, Brandon Basak, Rourav Zhu, Tiancong He, Yu Vranas, Mayia Weschke, Eugen Kawakami, Roland K. Birgeneau, Robert J. Frano, Alex |
| author_facet | Chen, Xiang Ruiz, Alejandro Bishop, Alexander J. Gunn, Brandon Basak, Rourav Zhu, Tiancong He, Yu Vranas, Mayia Weschke, Eugen Kawakami, Roland K. Birgeneau, Robert J. Frano, Alex |
| contents | The quasi-two-dimensional magnetic topological insulator MnBi$_2$Se$_4$, stabilized via non-equilibrium molecular beam epitaxy, is investigated by resonant soft x-ray scattering. Kiessig fringes are observed, confirming a high sample quality and a thin film thickness of 10 septuple layers ($\sim$13 nm). An antiferromagnetic Bragg peak is observed at the structurally forbidden reflection, whose magnetic nature is validated by studying its temperature, energy, and polarization dependence. Through a detailed analysis, an A-type antiferromagetic order with in-plane moments is implied. This alternative spin structure in MnBi$_2$Se$_4$, in contrast to the Ising antiferromagnetic states in other magnetic topological insulators, might be relevant for hosting new topological states. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_01064 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Antiferromagnetic order in a layered magnetic topological insulator MnBi$_2$Se$_4$ probed by resonant soft x-ray scattering Chen, Xiang Ruiz, Alejandro Bishop, Alexander J. Gunn, Brandon Basak, Rourav Zhu, Tiancong He, Yu Vranas, Mayia Weschke, Eugen Kawakami, Roland K. Birgeneau, Robert J. Frano, Alex Strongly Correlated Electrons Materials Science The quasi-two-dimensional magnetic topological insulator MnBi$_2$Se$_4$, stabilized via non-equilibrium molecular beam epitaxy, is investigated by resonant soft x-ray scattering. Kiessig fringes are observed, confirming a high sample quality and a thin film thickness of 10 septuple layers ($\sim$13 nm). An antiferromagnetic Bragg peak is observed at the structurally forbidden reflection, whose magnetic nature is validated by studying its temperature, energy, and polarization dependence. Through a detailed analysis, an A-type antiferromagetic order with in-plane moments is implied. This alternative spin structure in MnBi$_2$Se$_4$, in contrast to the Ising antiferromagnetic states in other magnetic topological insulators, might be relevant for hosting new topological states. |
| title | Antiferromagnetic order in a layered magnetic topological insulator MnBi$_2$Se$_4$ probed by resonant soft x-ray scattering |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2406.01064 |