Berry curvature derived negative magnetoconductivity observed in type-II magnetic Weyl semimetal films
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866913266027986944 |
|---|---|
| author | Nakamura, Ayano Nishihaya, Shinichi Ishizuka, Hiroaki Kriener, Markus Ohno, Mizuki Watanabe, Yuto Kawasaki, Masashi Uchida, Masaki |
| author_facet | Nakamura, Ayano Nishihaya, Shinichi Ishizuka, Hiroaki Kriener, Markus Ohno, Mizuki Watanabe, Yuto Kawasaki, Masashi Uchida, Masaki |
| contents | Here we study nonmonotonic features which appear both in magnetoresistivity and anomalous Hall resistivity during the simple magnetization process, by systematically measuring type-II magnetic Weyl semimetal EuCd$_2$Sb$_2$ films over a wide carrier density range. We find that a positive magnetoresistivity hump can be explained as manifestation of a field-linear term in the generalized magnetoconductivity formula including the Berry curvature. As also confirmed by model calculation, the term can be negative and pronounced near the Weyl point energy in the case that the Weyl cones are heavily tilted. Our findings demonstrate extensive effects of the Berry curvature on various magnetotransport in magnetic Weyl semimetals beyond the anomalous Hall effect. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_09924 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Berry curvature derived negative magnetoconductivity observed in type-II magnetic Weyl semimetal films Nakamura, Ayano Nishihaya, Shinichi Ishizuka, Hiroaki Kriener, Markus Ohno, Mizuki Watanabe, Yuto Kawasaki, Masashi Uchida, Masaki Materials Science Strongly Correlated Electrons Here we study nonmonotonic features which appear both in magnetoresistivity and anomalous Hall resistivity during the simple magnetization process, by systematically measuring type-II magnetic Weyl semimetal EuCd$_2$Sb$_2$ films over a wide carrier density range. We find that a positive magnetoresistivity hump can be explained as manifestation of a field-linear term in the generalized magnetoconductivity formula including the Berry curvature. As also confirmed by model calculation, the term can be negative and pronounced near the Weyl point energy in the case that the Weyl cones are heavily tilted. Our findings demonstrate extensive effects of the Berry curvature on various magnetotransport in magnetic Weyl semimetals beyond the anomalous Hall effect. |
| title | Berry curvature derived negative magnetoconductivity observed in type-II magnetic Weyl semimetal films |
| topic | Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2403.09924 |