TY - JOUR
KW - Metals
KW - Perovskite
KW - Metallic
KW - Metal
KW - Chemistry
KW - Electric fields
KW - Macromolecular Substances
KW - Polarization
KW - Domain walls
KW - Ferroelectric materials
KW - Nanostructures
KW - Materials testing
KW - Ferroelectricity
KW - Article
KW - Metal insulator boundaries
KW - Semiconductor insulator boundaries
KW - Metal insulator transition
KW - Scanning probe microscopy
KW - Surface properties
KW - Electromagnetic field
KW - Surface property
KW - Electric conductivity
KW - Nanomaterial
KW - Scanning probes
KW - Ferroelectric
KW - Lead-zirconate
KW - MIT
KW - Chemical modification
KW - Conformation
KW - Macromolecule
KW - Radiation exposure
KW - Ultrastructure
KW - Electromagnetic Fields
KW - Molecular Conformation
AU - P Maksymovych
AU - A.N Morozovska
AU - P Yu
AU - E.A Eliseev
AU - Y.-H Chu
AU - Ramamoorthy Ramesh
AU - A.P Baddorf
AU - S.V Kalinin
AB - Metallic conductance in charged ferroelectric domain walls was predicted more than 40 years ago as the first example of an electronically active homointerface in a nonconductive material. Despite decades of research on oxide interfaces and ferroic systems, the metal-insulator transition induced solely by polarization charges without any additional chemical modification has consistently eluded the experimental realm. Here we show that a localized insulator-metal transition can be repeatedly induced within an insulating ferroelectric lead-zirconate titanate, merely by switching its polarization at the nanoscale. This surprising effect is traced to tilted boundaries of ferroelectric nanodomains, that act as localized homointerfaces within the perovskite lattice, with inherently tunable carrier density. Metallic conductance is unique to nanodomains, while the conductivity of extended domain walls and domain surfaces is thermally activated. Foreseeing future applications, we demonstrate that a continuum of nonvolatile metallic states across decades of conductance can be encoded in the size of ferroelectric nanodomains using electric field. © 2011 American Chemical Society.
BT - Nano Letters
DO - 10.1021/nl203349b
LA - eng
M1 - 1
N1 - cited By 99
N2 - Metallic conductance in charged ferroelectric domain walls was predicted more than 40 years ago as the first example of an electronically active homointerface in a nonconductive material. Despite decades of research on oxide interfaces and ferroic systems, the metal-insulator transition induced solely by polarization charges without any additional chemical modification has consistently eluded the experimental realm. Here we show that a localized insulator-metal transition can be repeatedly induced within an insulating ferroelectric lead-zirconate titanate, merely by switching its polarization at the nanoscale. This surprising effect is traced to tilted boundaries of ferroelectric nanodomains, that act as localized homointerfaces within the perovskite lattice, with inherently tunable carrier density. Metallic conductance is unique to nanodomains, while the conductivity of extended domain walls and domain surfaces is thermally activated. Foreseeing future applications, we demonstrate that a continuum of nonvolatile metallic states across decades of conductance can be encoded in the size of ferroelectric nanodomains using electric field. © 2011 American Chemical Society.
PY - 2012
SP - 209
EP - 213
T2 - Nano Letters
TI - Tunable metallic conductance in ferroelectric nanodomains
VL - 12
SN - 15306984
ER -