True 3-D displays for avionics and mission crewstations
Elizabeth A. Sholler, Frederick M. Meyer, et al.
SPIE AeroSense 1997
Our calculations show that alkali metals at 1 2 a monolayer coverage adsorb at the quasi-hexagonal (H) pedestal sites on Si(001)-2 × 1 and form linear chains along the [110] dimer rows. To arrive at this conclusion, it is essential to incorporate the substrate relaxation because only then the H site is pulled down in energy relative to the other competing sites. The main relaxation consists of opening of the Si dimer bond length at the surface. The H site occupancy and the dimer bond opening are consistent with the conclusions of a recent LEED study. But a cluster model calculation has suggested that alkali metal chains at the H site are unstable towards a zig-zag Peierls type of distortion. It is shown that such a Peierls instability is not expected in the linear alkali metal chains on Si(001)-2 × 1. A theorem leading to gapless Peierls transitions due to zig-zag distortions is explicitly given along with an elementary proof. © 1991.
Elizabeth A. Sholler, Frederick M. Meyer, et al.
SPIE AeroSense 1997
E. Babich, J. Paraszczak, et al.
Microelectronic Engineering
William Hinsberg, Joy Cheng, et al.
SPIE Advanced Lithography 2010
Peter J. Price
Surface Science