Observation of 2D Weyl Fermion States in Epitaxial Bismuthene
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2023
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866917455032483840 |
|---|---|
| author | Lu, Qiangsheng Reddy, P. V. Sreenivasa Jeon, Hoyeon Mazza, Alessandro R. Brahlek, Matthew Wu, Weikang Yang, Shengyuan A. Cook, Jacob Conner, Clayton Zhang, Xiaoqian Chakraborty, Amarnath Yao, Yueh-Ting Tien, Hung-Ju Tseng, Chun-Han Yang, Po-Yuan Lien, Shang-Wei Lin, Hsin Chiang, Tai-Chang Vignale, Giovanni Li, An-Ping Chang, Tay-Rong Moore, Rob G. Bian, Guang |
| author_facet | Lu, Qiangsheng Reddy, P. V. Sreenivasa Jeon, Hoyeon Mazza, Alessandro R. Brahlek, Matthew Wu, Weikang Yang, Shengyuan A. Cook, Jacob Conner, Clayton Zhang, Xiaoqian Chakraborty, Amarnath Yao, Yueh-Ting Tien, Hung-Ju Tseng, Chun-Han Yang, Po-Yuan Lien, Shang-Wei Lin, Hsin Chiang, Tai-Chang Vignale, Giovanni Li, An-Ping Chang, Tay-Rong Moore, Rob G. Bian, Guang |
| contents | A two-dimensional (2D) Weyl semimetal featuring a spin-polarized linear band dispersion and a nodal Fermi surface is a new topological phase of matter. It is a solid-state realization of Weyl fermions in an intrinsic 2D system. The nontrivial topology of 2D Weyl cones guarantees the existence of a new form of topologically protected boundary states, Fermi string edge states. In this work, we report the realization of a 2D Weyl semimetal in monolayer-thick epitaxial bismuthene grown on SnS(Se) substrate. The intrinsic band gap of bismuthene is eliminated by the space-inversion-symmetry-breaking substrate perturbations, resulting in a gapless spin-polarized Weyl band dispersion. The linear dispersion and spin polarization of the Weyl fermion states are observed in our spin and angle-resolved photoemission measurements. In addition, the scanning tunneling microscopy/spectroscopy reveals a pronounced local density of states at the edge, suggesting the existence of Fermi string edge states. These results open the door for the experimental exploration of the exotic properties of Weyl fermion states in reduced dimensions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2303_02971 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Observation of 2D Weyl Fermion States in Epitaxial Bismuthene Lu, Qiangsheng Reddy, P. V. Sreenivasa Jeon, Hoyeon Mazza, Alessandro R. Brahlek, Matthew Wu, Weikang Yang, Shengyuan A. Cook, Jacob Conner, Clayton Zhang, Xiaoqian Chakraborty, Amarnath Yao, Yueh-Ting Tien, Hung-Ju Tseng, Chun-Han Yang, Po-Yuan Lien, Shang-Wei Lin, Hsin Chiang, Tai-Chang Vignale, Giovanni Li, An-Ping Chang, Tay-Rong Moore, Rob G. Bian, Guang Materials Science Mesoscale and Nanoscale Physics A two-dimensional (2D) Weyl semimetal featuring a spin-polarized linear band dispersion and a nodal Fermi surface is a new topological phase of matter. It is a solid-state realization of Weyl fermions in an intrinsic 2D system. The nontrivial topology of 2D Weyl cones guarantees the existence of a new form of topologically protected boundary states, Fermi string edge states. In this work, we report the realization of a 2D Weyl semimetal in monolayer-thick epitaxial bismuthene grown on SnS(Se) substrate. The intrinsic band gap of bismuthene is eliminated by the space-inversion-symmetry-breaking substrate perturbations, resulting in a gapless spin-polarized Weyl band dispersion. The linear dispersion and spin polarization of the Weyl fermion states are observed in our spin and angle-resolved photoemission measurements. In addition, the scanning tunneling microscopy/spectroscopy reveals a pronounced local density of states at the edge, suggesting the existence of Fermi string edge states. These results open the door for the experimental exploration of the exotic properties of Weyl fermion states in reduced dimensions. |
| title | Observation of 2D Weyl Fermion States in Epitaxial Bismuthene |
| topic | Materials Science Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2303.02971 |