Realization of a two-dimensional Weyl semimetal and topological Fermi strings

Qiangsheng Lu; P. V.Sreenivasa Reddy; Hoyeon Jeon; Alessandro R. Mazza; Matthew Brahlek; Weikang Wu; Shengyuan A. Yang; Jacob Cook; Clayton Conner; Xiaoqian Zhang; Amarnath Chakraborty; Yueh Ting Yao; Hung Ju Tien; Chun Han Tseng; Po Yuan Yang; Shang Wei Lien; Hsin Lin; Tai Chang Chiang; Giovanni Vignale; An Ping Li; Tay Rong Chang; Rob G. Moore; Guang Bian

doi:10.1038/s41467-024-50329-6

Realization of a two-dimensional Weyl semimetal and topological Fermi strings

Qiangsheng Lu, P. V.Sreenivasa Reddy, Hoyeon Jeon, Alessandro R. Mazza, Matthew Brahlek, Weikang Wu, Shengyuan A. Yang, Jacob Cook, Clayton Conner, Xiaoqian Zhang, Amarnath Chakraborty, Yueh Ting Yao, Hung Ju Tien, Chun Han Tseng, Po Yuan Yang, Shang Wei Lien, Hsin Lin, Tai Chang Chiang, Giovanni Vignale, An Ping LiTay Rong Chang, Rob G. Moore, Guang Bian

Department of Physics

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

A two-dimensional (2D) Weyl semimetal, akin to a spinful variant of graphene, represents a topological matter characterized by Weyl fermion-like quasiparticles in low dimensions. The spinful linear band structure in two dimensions gives rise to distinctive topological properties, accompanied by the emergence of Fermi string edge states. We report the experimental realization of a 2D Weyl semimetal, bismuthene monolayer grown on SnS(Se) substrates. Using spin and angle-resolved photoemission and scanning tunneling spectroscopies, we directly observe spin-polarized Weyl cones, Weyl nodes, and Fermi strings, providing consistent evidence of their inherent topological characteristics. Our work opens the door for the experimental study of Weyl fermions in low-dimensional materials.

Original language	English
Article number	6001
Journal	Nature communications
Volume	15
Issue number	1
DOIs	https://doi.org/10.1038/s41467-024-50329-6
Publication status	Published - 2024 Dec

All Science Journal Classification (ASJC) codes

General Chemistry
General Biochemistry,Genetics and Molecular Biology
General Physics and Astronomy

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Lu, Q., Reddy, P. V. S., Jeon, H., Mazza, A. R., Brahlek, M., Wu, W., Yang, S. A., Cook, J., Conner, C., Zhang, X., Chakraborty, A., Yao, Y. T., Tien, H. J., Tseng, C. H., Yang, P. Y., Lien, S. W., Lin, H., Chiang, T. C., Vignale, G., ... Bian, G. (2024). Realization of a two-dimensional Weyl semimetal and topological Fermi strings. Nature communications, 15(1), Article 6001. https://doi.org/10.1038/s41467-024-50329-6

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title = "Realization of a two-dimensional Weyl semimetal and topological Fermi strings",

abstract = "A two-dimensional (2D) Weyl semimetal, akin to a spinful variant of graphene, represents a topological matter characterized by Weyl fermion-like quasiparticles in low dimensions. The spinful linear band structure in two dimensions gives rise to distinctive topological properties, accompanied by the emergence of Fermi string edge states. We report the experimental realization of a 2D Weyl semimetal, bismuthene monolayer grown on SnS(Se) substrates. Using spin and angle-resolved photoemission and scanning tunneling spectroscopies, we directly observe spin-polarized Weyl cones, Weyl nodes, and Fermi strings, providing consistent evidence of their inherent topological characteristics. Our work opens the door for the experimental study of Weyl fermions in low-dimensional materials.",

author = "Qiangsheng Lu and Reddy, {P. V.Sreenivasa} and Hoyeon Jeon and Mazza, {Alessandro R.} and Matthew Brahlek and Weikang Wu and Yang, {Shengyuan A.} and Jacob Cook and Clayton Conner and Xiaoqian Zhang and Amarnath Chakraborty and Yao, {Yueh Ting} and Tien, {Hung Ju} and Tseng, {Chun Han} and Yang, {Po Yuan} and Lien, {Shang Wei} and Hsin Lin and Chiang, {Tai Chang} and Giovanni Vignale and Li, {An Ping} and Chang, {Tay Rong} and Moore, {Rob G.} and Guang Bian",

note = "Publisher Copyright: {\textcopyright} The Author(s) 2024.",

year = "2024",

month = dec,

doi = "10.1038/s41467-024-50329-6",

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Lu, Q, Reddy, PVS, Jeon, H, Mazza, AR, Brahlek, M, Wu, W, Yang, SA, Cook, J, Conner, C, Zhang, X, Chakraborty, A, Yao, YT, Tien, HJ, Tseng, CH, Yang, PY, Lien, SW, Lin, H, Chiang, TC, Vignale, G, Li, AP, Chang, TR, Moore, RG & Bian, G 2024, 'Realization of a two-dimensional Weyl semimetal and topological Fermi strings', Nature communications, vol. 15, no. 1, 6001. https://doi.org/10.1038/s41467-024-50329-6

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T1 - Realization of a two-dimensional Weyl semimetal and topological Fermi strings

AU - Lu, Qiangsheng

AU - Reddy, P. V.Sreenivasa

AU - Jeon, Hoyeon

AU - Mazza, Alessandro R.

AU - Brahlek, Matthew

AU - Wu, Weikang

AU - Yang, Shengyuan A.

AU - Cook, Jacob

AU - Conner, Clayton

AU - Zhang, Xiaoqian

AU - Chakraborty, Amarnath

AU - Yao, Yueh Ting

AU - Tien, Hung Ju

AU - Tseng, Chun Han

AU - Yang, Po Yuan

AU - Lien, Shang Wei

AU - Lin, Hsin

AU - Chiang, Tai Chang

AU - Vignale, Giovanni

AU - Li, An Ping

AU - Chang, Tay Rong

AU - Moore, Rob G.

AU - Bian, Guang

PY - 2024/12

Y1 - 2024/12

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AB - A two-dimensional (2D) Weyl semimetal, akin to a spinful variant of graphene, represents a topological matter characterized by Weyl fermion-like quasiparticles in low dimensions. The spinful linear band structure in two dimensions gives rise to distinctive topological properties, accompanied by the emergence of Fermi string edge states. We report the experimental realization of a 2D Weyl semimetal, bismuthene monolayer grown on SnS(Se) substrates. Using spin and angle-resolved photoemission and scanning tunneling spectroscopies, we directly observe spin-polarized Weyl cones, Weyl nodes, and Fermi strings, providing consistent evidence of their inherent topological characteristics. Our work opens the door for the experimental study of Weyl fermions in low-dimensional materials.

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Realization of a two-dimensional Weyl semimetal and topological Fermi strings

Abstract

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