Fig. 3: Defects in BaMnSn2.
From: Exploration of two surfaces observed in Weyl semimetal BaMnSb2
a, b, STM and current images (set point: −2 V, 50 pA) of an area show both type-A defect (green circle) and type-B (red circle) defects. A 2 × 1 unit cell is marked in a black rectangle. The scale bars represent 4 nm. c, d Two sequential STM images collected at the same location with 12 hours separation (set point: −1 V, 100 pA). All defects are marked by green (type-A) and red (type-B) circles, there are three of the red circles marked with blue crosses. See text for details. The scale bars represent 3.5 nm. e Local barrier height image from the same area as (c and d). f, g 2 × 1 reconstruction models (black rectangles) for T1 and T2 with both type-A (green circle) and type-B (red circle) defects. To differentiate from the truncated surface, the reconstructed atoms are draw in blue (R-Ba) and yellow (R-Sb2), respectively.
