Conduction of topologically protected charged ferroelectric domain walls

Weida Wu, Y. Horibe, N. Lee, S. W. Cheong, J. R. Guest

Research output: Contribution to journalArticlepeer-review

200 Scopus citations


We report on the observation of nanoscale conduction at ferroelectric domain walls in hexagonal HoMnO 3 protected by the topology of multiferroic vortices using in situ conductive atomic force microscopy, piezoresponse force microscopy, and Kelvin-probe force microscopy at low temperatures. In addition to previously observed Schottky-like rectification at low bias, conductance spectra reveal that negatively charged tail-to-tail walls exhibit enhanced conduction at high forward bias, while positively charged head-to-head walls exhibit suppressed conduction at high reverse bias. Our results pave the way for understanding the semiconducting properties of the domains and domain walls in small-gap ferroelectrics.

Original languageEnglish (US)
Article number077203
JournalPhysical review letters
Issue number7
StatePublished - Feb 14 2012

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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