Optical anisotropy of the SiC((001))- (3x2) surface: evidence for the two-adlayer asymmetric-dimer model

W Lu; WG Schmidt; EL Briggs; J Bernholc

doi:10.1103/PhysRevLett.85.4381

Optical anisotropy of the SiC((001))- (3x2) surface: evidence for the two-adlayer asymmetric-dimer model

Phys Rev Lett. 2000 Nov 13;85(20):4381-4. doi: 10.1103/PhysRevLett.85.4381.

Authors

W Lu¹, WG Schmidt, EL Briggs, J Bernholc

Affiliation

¹ Department of Physics, North Carolina State University, Raleigh, North Carolina 27695-8202, USA.

PMID: 11060643
DOI: 10.1103/PhysRevLett.85.4381

Abstract

The structure of the ( 3x2) reconstruction of beta-SiC(001) surface has been identified by comparing reflectance anisotropy spectra calculated from first principles with recent measurements. Only the calculations for the two-adlayer asymmetric-dimer model agree with experiment. The two prominent peaks at 3.6 and 5.0 eV found experimentally are assigned to electronic transitions between surface and bulklike electronic states. A further pronounced anisotropy at 2.0 eV, due to transitions between surface states, is predicted.