12:00 PM - 12:15 PM
[19a-C310-12] The development of low temperature scanning tunneling potentiometry
Keywords:scanning tunneling potentiometry, surface potential measurement, surface conductivity measurement
Scanning tunneling potentiometry (STP) enables us to map the topograph and electrostatic potential distributions simultaneously in atomic scale special resolution and uV level potential sensitivity on the surface under lateral current flowing parallel to the sample surface. We have developed UHV-STP, succeeded in STP on the Si(111)-(7x7) surface at room temperature, and observed potential drops at the phase boundaries of the 7x7 reconstructed structure, which have not been reported before.
As the next step, we are now exploiting LT-STP which can work in the low temperature where quantum phenomena such as electron localization and confinement effects are expected to emerge in the surface electrical conductivity.
As the next step, we are now exploiting LT-STP which can work in the low temperature where quantum phenomena such as electron localization and confinement effects are expected to emerge in the surface electrical conductivity.