About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Paper
Surface electronic structure of K on Si(111)2×1 as a function of potassium coverage
Abstract
We have studied the room-temperature deposition of potassium on the cleaved Si(111)2×1 surface with direct and inverse photoemission. In contrast to the analogous cesium case as well as the prediction of a total-energy calculation, we find that the 2×1 reconstruction is stable against K adsorption. The measured energy dispersions of the unoccupied surface-state band for about half- and full-monolayer coverages indicate a crossing of the Fermi level along the Jazimuth, suggesting a metallic substrate surface, as calculated by Ciraci and Batra. © 1990 The American Physical Society.