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Quasi-one-dimensional metallic conduction channels in exotic ferroelectric topological defects
- Source :
- Nature Communications, Vol 12, Iss 1, Pp 1-11 (2021), Nature Communications
- Publication Year :
- 2021
- Publisher :
- Nature Portfolio, 2021.
-
Abstract
- Ferroelectric topological objects (e.g. vortices, skyrmions) provide a fertile ground for exploring emerging physical properties that could potentially be utilized in future configurable nanoelectronic devices. Here, we demonstrate quasi-one-dimensional metallic high conduction channels along two types of exotic topological defects, i.e. the topological cores of (i) a quadrant vortex domain structure and (ii) a center domain (monopole-like) structure confined in high quality BiFeO3 nanoisland array, abbreviated as the vortex core and the center core. We unveil via phase-field simulations that the superfine (< 3 nm) metallic conduction channels along center cores arise from the screening charge carriers confined at the core whereas the high conductance of vortex cores results from a field-induced twisted state. These conducting channels can be repeatedly and reversibly created and deleted by manipulating the two topological states via an electric field, leading to an apparent electroresistance effect with an on/off ratio higher than 103. These results open up the possibility of utilizing these functional one-dimensional topological objects in high-density nanoelectronic devices such as ultrahigh density nonvolatile memory.<br />manuscript (21 pages, 4 figures) plus supplementary information
- Subjects :
- Ferroelectrics and multiferroics
Electronic properties and materials
Science
FOS: Physical sciences
General Physics and Astronomy
02 engineering and technology
01 natural sciences
General Biochemistry, Genetics and Molecular Biology
Article
Topological defect
Electric field
0103 physical sciences
010306 general physics
Physics
Condensed Matter - Materials Science
Multidisciplinary
Condensed matter physics
Materials Science (cond-mat.mtrl-sci)
General Chemistry
021001 nanoscience & nanotechnology
Thermal conduction
Ferroelectricity
Vortex
Non-volatile memory
Core (optical fiber)
Charge carrier
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 20411723
- Volume :
- 12
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Nature Communications
- Accession number :
- edsair.doi.dedup.....696c7527a990c5ab37cdc162bb536d15