[19a-C310-1~12] 6.6 Probe Microscopy

[19a-C310-7] Covalent bonding force and dissipation energy between an atom at a Si tip apex and surface atoms on Ge/Si(111) detected by nc-AFM

〇Toyoko Arai¹, Toshiki Tsuji¹, Daiki Kura¹, Taichi Shikichi¹, Masahiko Tomitori² (1.Kanazawa Univ., 2.JAIST)

Keywords:nc-AFM, dissipation energy

We have reported that Si adatoms on Si(111)-(7×7) were observed to be stable by nc-AFM, but the mechanical energy was dissipated where the adatoms moved between their sites and the neighboring hollow sites. We also found the similar phenomena on Ge/Si(111)-(5×5), where we discussed the possibility to distinguish atomic species between Si and Ge. Here we discuss the mechanism of energy dissipation for the adatom motion as well as over the Si and Ge adatoms.