The atomic structure of Ba layer on Si(0 0 1)-(2×1) surface is investigated by coaxial impact collision ion scattering spectroscopy. When 0.7 ML of Ba atoms are adsorbed on Si(0 0 1) at room temperature, the first preferential site of adsorption is T3 site with a height of 3.00±0.05 angstroms from the second layer of Si(0 0 1) even though the periodicity is poor. The next favorable site is HH site with a height of 3.50±0.05 angstroms from the second layer of Si(0 0 1).
Bibliographical noteFunding Information:
Authors thanks to T.N. Wittberg at University of Dayton for donation of Ba dispenser. This work was supported by the Korea Science and Engineering Foundation (KOSEF) through the Atomic-scale Surface Science Research Center (ASSRC) at Yonsei University.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry