Fig. 2: Broken surface symmetry and one-dimensional Co atom movement.
From: Anisotropic atom motion on a row-wise antiferromagnetic surface
a Two rotational domains of the row-wise AFM state in fcc-Mn/Re(0001), imaged by constant current SP-STM (U = +14 mV, I = 1 nA). b Calculated SP-STM image at U = +50 mV, 3 Å above the surface based on DFT, overlaid with Mn atoms (Blue/Yellow) and surface Re atoms (Gray); adatom hcp sites are marked by red crosses. c High resolution (non-magnetic) STM image (U = +30 mV, I = 1 nA) of the ↑↑-rows with native defects reflecting the broken symmetry of the hollow sites, see inset. d DFT calculated (non-magnetic) STM image at U = +50 mV, 3 Å above the surface. e A single Co atom is imaged while it is moving to the top of the image, guided by the ↑↑-rows (slow scan direction: bottom → top, fast scan direction: left → right). f The line section shows that the Co atom is imaged with an atomic periodicity of 2.7 Å, see red crosses in panels b and d.
