Effect of an Electric Field on the Optical Gap of Ge(111) 2 × 1 Surface States
Abstract
Results of electric field modulation of internal reflections in cleaved Ge(111) 2 × 1 surfaces are presented. They can be interpreted on the basis of a buckled model of the reconstructed surface with raised (lowered) atoms negatively (positively) charged. The value of the force constant for normal displacement of surface ions (1.1 × 105 dyn cm-1) is estimated.
- Publication:
-
Physical Review Letters
- Pub Date:
- October 1976
- DOI:
- 10.1103/PhysRevLett.37.934
- Bibcode:
- 1976PhRvL..37..934C