Gregory Czap, Kyungju Noh, et al.
APS Global Physics Summit 2025
Charge transport in 20-30-Å-thick Bi films is studied by scanning tunneling potentiometry at room temperature. Deposition at (Formula presented) K onto InP-based multilayer substrates leads to flat and continuous films that are subjected to a lateral current density of up to 8×(Formula presented) A/(Formula presented). We find that scattering at surface defects and grain boundaries gives rise to discontinuities in the local electrochemical potential. In particular, we observe dipole-shaped potential variations near small holes in the film. The influence of diffusive and ballistic transport on the formation of these dipoles is discussed. © 1996 The American Physical Society.
Gregory Czap, Kyungju Noh, et al.
APS Global Physics Summit 2025
P. Martensson, R.M. Feenstra
Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
K.A. Chao
Physical Review B
Mark W. Dowley
Solid State Communications