Hjw. Zandvliet et al., STM TIP-INDUCED CREATION AND ANNIHILATION OF SMALL GE CLUSTERS AND MISSING DIMER VACANCIES ON GE(001), Physical review. B, Condensed matter, 57(3), 1998, pp. 1356-1358
We have observed the appearance and disappearance of small Ge clusters
and missing dimer vacancies on Ge/(011) during scanning with a scanni
ng tunneling microscope (STM) under standard tunneling conditions at r
oom temperature. We claim that these processes are induced by the STM
tip. Moreover, we emphasize that the observed features depend on the u
sage of different W tips, even if prepared following the same procedur
e and using the same tunneling conditions, suggesting a critical influ
ence of the tip shape.