Direct probing of charge injection and polarization-controlled ionic mobility on ferroelectric LiNbO(3) surfaces

Evgheni Strelcov; Anton V Ievlev; Stephen Jesse; Ivan I Kravchenko; Vladimir Y Shur; Sergei V Kalinin

doi:10.1002/adma.201304002

Direct probing of charge injection and polarization-controlled ionic mobility on ferroelectric LiNbO(3) surfaces

Adv Mater. 2014 Feb 12;26(6):958-63. doi: 10.1002/adma.201304002. Epub 2013 Nov 26.

Authors

Evgheni Strelcov¹, Anton V Ievlev, Stephen Jesse, Ivan I Kravchenko, Vladimir Y Shur, Sergei V Kalinin

Affiliation

¹ Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831, United States.

PMID: 24277472
DOI: 10.1002/adma.201304002

Abstract

Mapping surface potential with time-resolved Kelvin probe force microscopy (tr-KPFM) in LiNbO3 periodically poled single crystals reveals activation of the surface ionic subsystem. Electric fields of certain strength induce injection of charge, formation of an active region in its vicinity and uneven distribution of screening charge on the opposite ferroelectric domains. Tr-KPFM technique allows investigating these phenomena in details.

Keywords: KPFM; LiNbO3; ferroelectric; potential mapping; surface charge.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.