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Polarization-Modulated Rectification at Ferroelectric Surfaces

Authors
Wu, WeidaGuest, J. R.Horibe, Y.Park, S.Choi, T.Cheong, S. -W.Bode, M.
Issue Date
May-2010
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.104, no.21
Journal Title
PHYSICAL REVIEW LETTERS
Volume
104
Number
21
URI
https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/22449
DOI
10.1103/PhysRevLett.104.217601
ISSN
0031-9007
1079-7114
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.
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자연과학대학 (물리학과)
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