Optical Anisotropy of the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>SiC</mi></mrow><mrow><mo>(</mo><mn>001</mn><mo>)</mo></mrow></msub></mrow></math></span>- <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mo>(</mo><mn>3</mn><mo>×</mo><mn>2</mn><mo>)</mo></math></span> Surface: Evidence for the Two-Adlayer Asymmetric-Dimer Model

Wenchang Lu; W. G. Schmidt; E. L. Briggs; J. Bernholc

doi:10.1103/PhysRevLett.85.4381

Optical Anisotropy of the ${SiC}_{(001)}$ - $(3 \times 2)$ Surface: Evidence for the Two-Adlayer Asymmetric-Dimer Model

Wenchang Lu, W. G. Schmidt, E. L. Briggs, and J. Bernholc

Phys. Rev. Lett. 85, 4381 – Published 13 November 2000

Abstract

The structure of the ( $3 \times 2$ ) reconstruction of $β$ -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.

Received 31 July 2000

DOI:https://doi.org/10.1103/PhysRevLett.85.4381

Authors & Affiliations

Wenchang Lu¹, W. G. Schmidt², E. L. Briggs¹, and J. Bernholc¹

¹Department of Physics, North Carolina State University, Raleigh, North Carolina 27695-8202
²Institut für Festkörpertheorie und Theoretische Optik, Friedrich-Schiller-Universität, Max-Wien-Platz 1, 07743 Jena, Germany