Mn4Al11: A Half-Semimetal Candidate with Anomalous Electronic Behaviors
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arXiv
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| Auteurs principaux: | , , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866916907553128448 |
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| author | Han, Shanshan Li, Rongsheng Jiang, Xingxing Lu, Ming Xu, Shuxiang Zeng, Jiang Wu, Dong Wang, Nanlin |
| author_facet | Han, Shanshan Li, Rongsheng Jiang, Xingxing Lu, Ming Xu, Shuxiang Zeng, Jiang Wu, Dong Wang, Nanlin |
| contents | Half-semimetals, characterized by their spin-polarized electronic states, hold significant promise for spintronic applications but remain scarce due to stringent electronic and magnetic criteria. Through a combination of transport measurements and optical spectroscopy, we investigated the intermetallic compound Mn4Al11, which features an exceptionally low carrier concentration and undergoes a magnetic phase transition near 68 K. Transport measurements reveal anomalies that deviate from typical metallic behavior at low temperatures. Optical spectroscopy indicates a small, nearly frequency-independent optical conductivity in the far-infrared region, with spectral weight decreasing as the temperature drops from 300 K to 50 K. These behaviors suggest a temperaturedependent carrier density and significant scattering of charge carriers. Combining experimental findings with calculated electronic band structures, we propose that Mn4Al11 is a novel half-semimetal candidate exhibiting a ferrimagnetic ground state. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_11930 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Mn4Al11: A Half-Semimetal Candidate with Anomalous Electronic Behaviors Han, Shanshan Li, Rongsheng Jiang, Xingxing Lu, Ming Xu, Shuxiang Zeng, Jiang Wu, Dong Wang, Nanlin Strongly Correlated Electrons Half-semimetals, characterized by their spin-polarized electronic states, hold significant promise for spintronic applications but remain scarce due to stringent electronic and magnetic criteria. Through a combination of transport measurements and optical spectroscopy, we investigated the intermetallic compound Mn4Al11, which features an exceptionally low carrier concentration and undergoes a magnetic phase transition near 68 K. Transport measurements reveal anomalies that deviate from typical metallic behavior at low temperatures. Optical spectroscopy indicates a small, nearly frequency-independent optical conductivity in the far-infrared region, with spectral weight decreasing as the temperature drops from 300 K to 50 K. These behaviors suggest a temperaturedependent carrier density and significant scattering of charge carriers. Combining experimental findings with calculated electronic band structures, we propose that Mn4Al11 is a novel half-semimetal candidate exhibiting a ferrimagnetic ground state. |
| title | Mn4Al11: A Half-Semimetal Candidate with Anomalous Electronic Behaviors |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2508.11930 |