P. Muralt, H.P. Meier, et al.
Applied Physics Letters
Simple modification of the electronics of a STM allows operation in various tracking modes. Profiles of steepest inclination, equal height, equipotential, electrical field lines, etc., can be traced out. The tunnel tip can also be locked to a surface extremity for indefinite time. Some of these possibilities were tested experimentally.
P. Muralt, H.P. Meier, et al.
Applied Physics Letters
D. Pohl, W. Kaiser
Physical Review B
B. Hecht, D. Pohl, et al.
Ultramicroscopy
H. Heinzelmann, Th. Lacoste, et al.
Thin Solid Films