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Magnetization-direction-tunable kagome Weyl line

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arxiv 2203.10648 v1 pith:FKCZGSHI submitted 2022-03-20 cond-mat.str-el

Magnetization-direction-tunable kagome Weyl line

Zi-Jia Cheng , Ilya Belopolski , Tyler A. Cochran , Hung-Ju Tien , Xian P. Yang , Wenlong Ma , Jia-Xin Yin , Junyi Zhang
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Chris Jozwiak Aaron Bostwick Eli Rotenberg Guangming Cheng Md. Shafayat Hossain Qi Zhang Nana Shumiya Daniel Multer Maksim Litskevich Yuxiao Jiang Nan Yao Biao Lian Guoqing Chang Shuang Jia Tay-Rong Chang M. Zahid Hasan
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classification cond-mat.str-el
keywords kagomeweyllinemagneticorderout-of-planetopologicalangle-resolved
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Kagome magnets provide a fascinating platform for a plethora of topological quantum phenomena. Here, utilizing angle-resolved photoemission spectroscopy, we demonstrate Weyl lines with strong out-of-plane dispersion in an A-A stacked kagome magnet TbxGd1-xMn6Sn6. On the Gd rich side, the Weyl line remains nearly spin-orbit-gapless due to a remarkable cooperative interplay between Kane-Mele spin-orbit-coupling, low site symmetry and in-plane magnetic order. Under Tb substitution, the kagome Weyl line gaps due to a magnetic reorientation to out-of-plane order. Our results illustrate the magnetic moment direction as an efficient tuning knob for realizing distinct three-dimensional topological phases.

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