Saved in:
| Main Authors: | , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2412.13457 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866915069432954880 |
|---|---|
| author | Yang, Ming Zhao, Wenxuan Mu, Dan Shi, Zhijian Zhong, Jingyuan Li, Yaqi Liu, Yundan Zhong, Jianxin Cheng, Ningyan Zhou, Wei Wang, Jianfeng Shi, Yan Sun, Ying Hao, Weichang Yang, Lexian Zhuang, Jincheng Du, Yi |
| author_facet | Yang, Ming Zhao, Wenxuan Mu, Dan Shi, Zhijian Zhong, Jingyuan Li, Yaqi Liu, Yundan Zhong, Jianxin Cheng, Ningyan Zhou, Wei Wang, Jianfeng Shi, Yan Sun, Ying Hao, Weichang Yang, Lexian Zhuang, Jincheng Du, Yi |
| contents | Massive Dirac fermions, which are essential for realizing novel topological phenomena, are expected to be generated from massless Dirac fermions by breaking the related symmetry, such as time-reversal symmetry (TRS) in topological insulators or crystal symmetry in topological crystalline insulators. Here, we report scanning tunneling microscopy and angle-resolved photoemission spectroscopy studies of α-Bi4I4, which reveals the realization of massive Dirac fermions in the (100) surface states without breaking the TRS. Combined with first-principle calculations, our experimental results indicate that the spontaneous symmetry breaking engenders two nondegenerate edges states at the opposite sides of monolayer Bi4I4 after the structural phase transition, imparting mass to the Dirac fermions after taking the interlayer coupling into account. Our results not only demonstrate the formation of the massive Dirac fermions by spontaneous symmetry breaking, but also imply the potential for the engineering of Dirac fermions for device applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_13457 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Mass Acquisition of Dirac Fermions in Bi4I4 by Spontaneous Symmetry Breaking Yang, Ming Zhao, Wenxuan Mu, Dan Shi, Zhijian Zhong, Jingyuan Li, Yaqi Liu, Yundan Zhong, Jianxin Cheng, Ningyan Zhou, Wei Wang, Jianfeng Shi, Yan Sun, Ying Hao, Weichang Yang, Lexian Zhuang, Jincheng Du, Yi Materials Science Massive Dirac fermions, which are essential for realizing novel topological phenomena, are expected to be generated from massless Dirac fermions by breaking the related symmetry, such as time-reversal symmetry (TRS) in topological insulators or crystal symmetry in topological crystalline insulators. Here, we report scanning tunneling microscopy and angle-resolved photoemission spectroscopy studies of α-Bi4I4, which reveals the realization of massive Dirac fermions in the (100) surface states without breaking the TRS. Combined with first-principle calculations, our experimental results indicate that the spontaneous symmetry breaking engenders two nondegenerate edges states at the opposite sides of monolayer Bi4I4 after the structural phase transition, imparting mass to the Dirac fermions after taking the interlayer coupling into account. Our results not only demonstrate the formation of the massive Dirac fermions by spontaneous symmetry breaking, but also imply the potential for the engineering of Dirac fermions for device applications. |
| title | Mass Acquisition of Dirac Fermions in Bi4I4 by Spontaneous Symmetry Breaking |
| topic | Materials Science |
| url | https://arxiv.org/abs/2412.13457 |