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
Test of structural models for the Si{111} 2 × 1 surface
Abstract
New low-energy electron diffraction (LEED) experiments and new calculations on Si{111} 2 × 1 surfaces have produced the following results: (1) LEED intensity data from different surfaces cleaved in different directions in different experiments are reproduced well-thus, if two or more different 2 × 1 superstructures occur simultaneously on cleaved surfaces, their propertions are always the same; (2) LEED intensity calculations of different authors with different computer programs are reproducible-thus, confidence in the reliability of the calculations is confirmed; (3) the buckling model, the π-bonded chain model, the Seiwatz model, and the Chadi molecular model all fail the LEED test-thus, the Si{111} 2 × 1 structural problem is still unsolved. A complete test of these models requires consideration of distortions in deeper atomic layers, so far unknown. © 1983 The American Physical Society.