Spin-resolved photoemission from submonolayer Ag on Si(111): Ag adsorption in the ( sqrt 3 x sqrt 3 )R30 degrees phase with no Ag-Ag interaction and in the 1 x 1 structure with strong Ag-Ag interaction
Phys Rev B Condens Matter. 1990 Nov 15;42(14):9267-9270.
doi: 10.1103/physrevb.42.9267.