Spatially resolved spectroscopy of MgO-Fe(100)-MgO(100) structure

Scanning tunneling spectroscopy and microscopy is used for correlating the local density of electronic states with the topography of Fe on MgO and MgO on Fe. The studies have shown that at one monolayer, the measured density of states is different from either very thick or very thin MgO, suggesting the possibility of an interfacial layer that are distinct from the Fe (100) and MgO (100) surfaces.