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Direct Probing of Charge Injection and Polarization‐Controlled Ionic Mobility on Ferroelectric LiNbO 3 Surfaces
Author(s) -
Strelcov Evgheni,
Ievlev Anton V.,
Jesse Stephen,
Kravchenko Ivan I.,
Shur Vladimir Y.,
Kalinin Sergei V.
Publication year - 2014
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201304002
Subject(s) - kelvin probe force microscope , materials science , ferroelectricity , polarization (electrochemistry) , ionic bonding , surface charge , electric field , piezoresponse force microscopy , charge (physics) , optoelectronics , microscopy , piezoelectricity , charge density , chemical physics , condensed matter physics , nanotechnology , optics , atomic force microscopy , ion , dielectric , composite material , chemistry , physics , organic chemistry , quantum mechanics
Mapping surface potential with time‐resolved Kelvin probe force microscopy (tr‐KPFM) in LiNbO 3 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.