Fig. 4: Topological properties of the corner between the (11) and \((1\bar{1})\) edges.
From: Identifying s-wave pairing symmetry in single-layer FeSe from topologically trivial edge states
a STM topographic image (Vs = 1 V, It = 50 pA) of the corner. Inset: zoom-in image. b Atomically resolved image (Vs = 50 mV, It = 500 pA) taken from the area outlined by the blue box in (a). c Zero-bias conductance map obtained from the spectroscopic mapping over the area indicated by the black dashed box in (a). The purple circles mark the origin point. d The tunneling spectra collected along the gray arrow in (a). The data are vertically shifted in the direction of the gray arrow for clarity. The black and gray horizontal lines indicate the position of the zero conductance of corresponding tunneling spectra. The gray shaded line is a guide to the evolution of the zero-bias conductance.
