Polarization-modulated rectification at ferroelectric surfaces

Weida Wu, J. R. Guest, Y. Horibe, S. Park, T. Choi, S. W. Cheong, M. Bode

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

By correlating room temperature conductive atomic force microscopy with low temperature electrostatic force microscopy images of the same sample region, we demonstrate that nanoscale electric conduction between a sharp tip and the surface of ferroelectric HoMnO3 is intrinsically modulated by the polarization of ferroelectric domains. Conductance spectra reveal that the electric conduction is described by polarization-induced Schottky-like rectification at low bias, but dominated by a space-charge limited conduction mechanism at high bias. Our observation demonstrates visualization of ferroelectric domain structure by electric conduction, which may be used for nondestructive readout of nanoscale ferroelectric memories and/or ferroelectric sensors.

Original languageEnglish (US)
Article number217601
JournalPhysical review letters
Volume104
Issue number21
DOIs
StatePublished - May 24 2010

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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