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
Tags
topological properties
Weyl semimetal
PrAlGe
spin-orbit magnet
photoemission spectroscopy
Berry curvature
anomalous Hall response
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