Conformational Domain Wall Switch
Abstract
Domain walls in ferroelectric materials have tantalizing potential in disruptive memory and reconfigurable nanoelectronics technologies. Here, a ferroelectric domain wall switch with three distinct addressable resistance states is demonstrated. The device operation hinges on fully controllable and reversible conformational changes of the domain wall. As validated by atomistic simulations consistent with the experiments, using electric field, the shape—and hence the charge state—of the domain wall and ultimately its conduction are altered. Sequential nanoscale transitions of the walls are visualized directly using stroboscopic‐piezoresponse force microscopy and Kelvin probe microscopy. Anisotropic head‐to‐head domain wall injection, stabilized by the majority carrier type of the ferroelectric, BiFeO3, is identified as the key factor that enables conformational control.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 11, 2019
- Source ID
- 10.1002/adfm.201807523
Entities
People
- Daniel Sando
- Jan Seidel
- Laurent Bellaiche
- Long‐qing Chen
- Pankaj Sharma
- Qi Zhang
- Ralph Bulanadi
- Sergei Prokhorenko
- Sergey Prosandeev
- Valanoor Nagarajan
- Xiaoxing Cheng
Organizations
- Australian Research Council
- Defense Advanced Research Projects Agency
- Office of Naval Research
- Pennsylvania State University
- United States Department of Energy
- University of Arkansas
- University of Liège
- University of New South Wales