Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2023
|
| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2310.11378 |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866914951275216896 |
|---|---|
| author | Yi, Zhe-Kai Guo, Peng-Jie Liang, Hui Li, Yi-Ran Su, Ping Li, Na Zhou, Ying Wu, Dan-Dan Sun, Yan Yue, Xiao-Yu Li, Qiu-Ju Wang, Shou-Guo Sun, Xue-Feng Wang, Yi-Yan |
| author_facet | Yi, Zhe-Kai Guo, Peng-Jie Liang, Hui Li, Yi-Ran Su, Ping Li, Na Zhou, Ying Wu, Dan-Dan Sun, Yan Yue, Xiao-Yu Li, Qiu-Ju Wang, Shou-Guo Sun, Xue-Feng Wang, Yi-Yan |
| contents | Anomalous Hall effect (AHE), one of the most important electronic transport phenomena, generally appears in ferromagnetic materials but is rare in materials without magnetic elements. Here, we present a study of La$_3$MgBi$_5$, whose band structure carries multitype Dirac fermions. Although magnetic elements are absent in La$_3$MgBi$_5$, clear signals of AHE can be observed. In particular, the anomalous Hall conductivity is extremely large, reaching 42,356 $Ω^{-1}$ cm$^{-1}$ with an anomalous Hall angle of 8.8 %, the largest one that has been observed in the current AHE systems. The AHE is suggested to originate from the combination of skew scattering and Berry curvature. Another unique property discovered in La$_3$MgBi$_5$ is the axial diamagnetism. The diamagnetism is significantly enhanced and dominates the magnetization in the axial directions, which is the result of restricted motion of the Dirac fermion at Fermi level. Our findings not only establish La$_3$MgBi$_5$ as a suitable platform to study AHE and quantum transport, but also indicate the great potential of 315-type Bi-based materials for exploring novel physical properties. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_11378 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Extremely large anomalous Hall conductivity and unusual axial diamagnetism in a quasi-1D Dirac material La$_3$MgBi$_5$ Yi, Zhe-Kai Guo, Peng-Jie Liang, Hui Li, Yi-Ran Su, Ping Li, Na Zhou, Ying Wu, Dan-Dan Sun, Yan Yue, Xiao-Yu Li, Qiu-Ju Wang, Shou-Guo Sun, Xue-Feng Wang, Yi-Yan Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons Anomalous Hall effect (AHE), one of the most important electronic transport phenomena, generally appears in ferromagnetic materials but is rare in materials without magnetic elements. Here, we present a study of La$_3$MgBi$_5$, whose band structure carries multitype Dirac fermions. Although magnetic elements are absent in La$_3$MgBi$_5$, clear signals of AHE can be observed. In particular, the anomalous Hall conductivity is extremely large, reaching 42,356 $Ω^{-1}$ cm$^{-1}$ with an anomalous Hall angle of 8.8 %, the largest one that has been observed in the current AHE systems. The AHE is suggested to originate from the combination of skew scattering and Berry curvature. Another unique property discovered in La$_3$MgBi$_5$ is the axial diamagnetism. The diamagnetism is significantly enhanced and dominates the magnetization in the axial directions, which is the result of restricted motion of the Dirac fermion at Fermi level. Our findings not only establish La$_3$MgBi$_5$ as a suitable platform to study AHE and quantum transport, but also indicate the great potential of 315-type Bi-based materials for exploring novel physical properties. |
| title | Extremely large anomalous Hall conductivity and unusual axial diamagnetism in a quasi-1D Dirac material La$_3$MgBi$_5$ |
| topic | Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2310.11378 |