Physics

Observation of Weyl fermions in a magnetic non-centrosymmetric crystal

D. S. Sanchez, G. Chang, et al.

This groundbreaking study by Daniel S. Sanchez and colleagues unveils the observation of remarkable topological properties in the non-centrosymmetric spin-orbit magnet PrAlGe, revealing topological Fermi arcs and Weyl fermions, paving the way for novel insights into Weyl semimetal phases.

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Index

Abstract

This study reports the observation of topological properties in the non-centrosymmetric spin-orbit magnet PrAlGe. Using photoemission spectroscopy below the Curie temperature, topological Fermi arcs were observed, corresponding to projected topological charges of ±1. Bulk linear energy dispersion of Weyl fermions was also observed, along with a large anomalous Hall response in magneto-transport measurements, attributed to diverging bulk Berry curvature fields associated with the Weyl band structure. These findings establish a novel Weyl semimetal phase in PrAlGe.

Publisher

Nature Communications

Published On

Jul 03, 2020

Authors

Daniel S. Sanchez, Guoqing Chang, Ilya Belopolski, Hong Lu, Jia-Xin Yin, Nasser Alidoust, Xitong Xu, Tyler A. Cochran, Xiao Zhang, Yi Bian, Songtian S. Zhang, Yi-Yuan Liu, Jie Ma, Guang Bian, Hsin Lin, Su-Yang Xu, Shuang Jia, M. Zahid Hasan

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