F.J. Himpsel
Physical Review B
An oscillatory reversal of the contrast between Cu and Mo is observed with scanning tunneling microscopy (STM), using sample bias voltages of +5 V and higher. It is attributed to tunneling via a series of discrete states that are induced by a combination of the image potential and the applied field. They are offset in energy due to the different work functions of Cu and Mo. This effect provides a generally applicable mechanism for elemental contrast in STM. © 1995 The American Physical Society.
F.J. Himpsel
Physical Review B
Theodore E. Madey, Roger Stockbauer, et al.
Physical Review B
T.F. Heinz, F.J. Himpsel, et al.
Physical Review Letters
M. Iwan, E.E. Koch, et al.
Solid State Communications