Scanning tunneling microscopic investigation on morphology of magnetic Weyl semimetal YbMnBi<sub>2</sub>

Scanning tunneling microscopic investigation on morphology of magnetic Weyl semimetal YbMnBi₂

Zhu Zhen¹, Yan Dong², Nie Xiao-Ang¹, Xu Hao-Ke¹, Yang Xu¹, Guan Dan-Dan^{1, 3, 4}, Wang Shiyong^{1, 3, 4}, Li Yao-Yi^{1, 3, 4}, Liu Canhua^{1, 3, 4}, Liu Jun-Wei⁵, Luo Hui-Xia², Zheng Hao^{1, 3, 4, †}, Jia Jin-Feng^{1, 3, 4, ‡}

Morphology of YbMnBi₂. Typical large-scale STM topographic images of YbMnBi₂: (a) 100 nm×100 nm, 500 mV, 100 pA and (b) 250 nm×250 nm, 500 mV, 100 pA. In order to enhance the visibility, d z / d x images are presented. (c) STM image (93 nm×69 nm, 100 mV, 500 pA) of YbMnBi₂ with terrace and incline in three-dimensional representation. (d) and (e) Atomically-resolved STM topographic images (6 nm×6 nm, 50 mV, 5 nA) of terrace and incline of YbMnBi₂, respectively. The images are taken at the square area marked in (c). Multiple unit-cells are labeled with red and orange rectangles. Different surface configurations are apparently discerned on two facets.