Fig. 1: Scanning tunneling spectroscopy probing the differential conductance of a Co adatom.
From: A new view on the origin of zero-bias anomalies of Co atoms atop noble metal surfaces
a Illustration of the tip of a microscope scanning the surface of Au(111) on which an fcc Co adatom is deposited. b The differential conductance, dI/dV, measured at T = 6 K17 compared to first-principles results. As deduced from the change of the LDOS owing to the presence of spin-excitations, Δn, the zero-bias anomaly stems from gaped spin-excitations and the presence of a many-body bound state, a spinaron, at positive bias voltage. The experimental data adapted with permission from IOP Publishing—Japan Society of Applied Physics—Copyright (2005).
