The role of the surface phases in surface conductivity

The surface conductivity of the samples with AurSi 100., NarSi 100.and HrSi 100.surface phases was measured in ultra-high vacuum by four-point probe method at RT. We have found that difference in surface conductivity of the silicon substrate with surface phase and clean Si 100.2=1 surface is 6.0"1.9.=10y5 Vy1I for c 8=2.-Au, 11.1"0.8.= 10y5 Vy1I for 626=3-Au and - 1.5"0.8.=10y5 Vy1I for 3=2-Na surface phase. These variations of surface conductivity are estimated to originate, in general, from the formation of the surface phases. q2000 Elsevier Science B.V. All rights reserved