[14p-A32-1~16] 6.6 Probe Microscopy

[14p-A32-1] The evaluation of the phase boundary conductivity on the Si(111)-7x7 surface

〇Masayuki Hamada¹, Yukio Hasegawa¹ (1.ISSP, the univ. of Tokyo)

Keywords:STP, surface conductivity, Si(111)-(7x7)

Scanning tunneling potentiometry (STP) provides nano-scale spatial distribution of surface electrical potential in μV resolution. However, STP has seldom been applied to atomically-ordered surfaces under ultrahigh vacuum (UHV). We have developed UHV-STP, succeeded in STP on the Si(111)-(7x7) surface, and observed potential drop at the phase boundaries, which has not been reported before.