Scanning nonlinear dielectric potentiometry

Kohei Yamasue, Yasuo Cho

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Measuring spontaneous polarization and permanent dipoles on surfaces and interfaces on the nanoscale is difficult because the induced electrostatic fields and potentials are often influenced by other phenomena such as the existence of monopole fixed charges, screening charges, and contact potential differences. A method based on tip-sample capacitance detection and bias feedback is proposed which is only sensitive to polarization- or dipole-induced potentials, unlike Kelvin probe force microscopy. The feasibility of this method was demonstrated by simultaneously measuring topography and polarization-induced potentials on a reconstructed Si(111)-(7 × 7) surface with atomic resolution.

Original languageEnglish
Article number093704
JournalReview of Scientific Instruments
Volume86
Issue number9
DOIs
Publication statusPublished - 2015 Sep 1

ASJC Scopus subject areas

  • Instrumentation

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