M. Hargrove, S.W. Crowder, et al.
IEDM 1998
The c(2×2) surface phase obtained from deposition of submonolayer amounts of Pd onto a clean Cu{001} surface is proven to have a top layer consisting of an ordered 50%-50% mixture of Pd and Cu atoms, and no ordered content in deeper layers, analogous to the structure found for Cu{001}c(2×2)-Au. The structure of the top layer is almost planar, with the Pd atoms located 0.020.03 A outwards from the Cu atoms, and an interlayer distance from the Cu atoms to second (100% Cu) layer equal to the Cu{001} bulk interlayer spacing (1.807 A). Angle-resolved photoemission spectra show that the valence band of the surface alloy is characterized by a well-defined Cu 3d derived band and by the appearance of features due to Pd. The narrower width of the observed photoemission peaks compared with the valence band of Cu-rich Cu-Pd alloys studied by others confirms the ordered-alloy nature of the Cu{001}c(2×2)-Pd surface phase. © 1988 The American Physical Society.
M. Hargrove, S.W. Crowder, et al.
IEDM 1998
I. Morgenstern, K.A. Müller, et al.
Physica B: Physics of Condensed Matter
Corneliu Constantinescu
SPIE Optical Engineering + Applications 2009
K.A. Chao
Physical Review B