The Ge(110) surfaces were observed in situ using scanning tunnelling microscopy during cooling to room temperature after annealing at 720C. The observation led to an interesting finding that 2 x 16 and c(8 x 10) structures, which were accepted to be reconstructed structures at the clean Ge (110) surface, were quite different in symmetry but had a considerably similar geometrical relationship with each other in atomic structure.

Ge(110) Surface Reconstruction Observed with Scanning Tunnelling Microscopy. T.Ichikawa, T.Sueyosi, T.Sato, M.Iwatsuki, F.Udagawa, I.Sumita: Solid State Communications, 1995, 93[6], 541-45