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@article{Douglas:2015:10.1063/1.4934833,
author = {Douglas, AM and Kumar, A and Whatmore, RW and Gregg, JM},
doi = {10.1063/1.4934833},
journal = {Applied Physics Letters},
title = {Local conductance: A means to extract polarization and depolarizing fields near domain walls in ferroelectrics},
url = {http://dx.doi.org/10.1063/1.4934833},
volume = {107},
year = {2015}
}

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TY  - JOUR
AB  - Conducting atomic force microscopy images of bulk semiconducting BaTiO3 surfaces show clearstripe domain contrast. High local conductance correlates with strong out-of-plane polarization(mapped independently using piezoresponse force microscopy), and current-voltage characteristicsare consistent with dipole-induced alterations in Schottky barriers at the metallic tip-ferroelectricinterface. Indeed, analyzing current-voltage data in terms of established Schottky barrier modelsallows relative variations in the surface polarization, and hence the local domain structure, to bedetermined. Fitting also reveals the signature of surface-related depolarizing fields concentratednear domain walls. Domain information obtained from mapping local conductance appears to bemore surface-sensitive than that from piezoresponse force microscopy. In the right materials systems,local current mapping could therefore represent a useful complementary technique for evaluatingpolarization and local electric fields with nanoscale resolution
AU  - Douglas,AM
AU  - Kumar,A
AU  - Whatmore,RW
AU  - Gregg,JM
DO  - 10.1063/1.4934833
PY  - 2015///
SN  - 0003-6951
TI  - Local conductance: A means to extract polarization and depolarizing fields near domain walls in ferroelectrics
T2  - Applied Physics Letters
UR  - http://dx.doi.org/10.1063/1.4934833
UR  - http://hdl.handle.net/10044/1/48225
VL  - 107
ER  -

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