Electronic switching by metastable polarization states in BiFe O3 thin films
Abstract
Here, we present an approach to control resistive switching in metal-ferroelectric contacts using a radially symmetric electric field. In ferroelectrics with significant polarization along the corresponding field lines, the field above a critical threshold will induce polarization discontinuity, a corresponding nanoscale volume of space charge, and a conducting junction. We demonstrate this principle using nanoscale polarization switching of a conventional (001)-oriented thin film of BiFeO3. Without any optimization, the conducting state created in this regime of resistive switching exhibits local currents of ~1–10nA, approaching the ~100nA threshold required for device implementation [J. Jiang et al., Nat. Mater. 17, 49 (2018)]. The corresponding electronic function is that of a volatile resistive switch, which is directly compatible with neuristor functionality that encodes the functioning basis of an axon [M. D. Pickett et al., Nat. Mater. 12, 114 (2013)]. Phase-field modeling further reveals that in the strongly charged local configuration, BiFeO3 locally undergoes a rhombohedral-tetragonal (R-T) phase transition, in part due to substantial piezoelectric expansion of the lattice. The estimated local charge density can be as high as ~1021cm-3, which would be extremely difficult to achieve by conventional doping approaches without altering other material properties. Therefore, this method for creating stable and reproduciblemore »
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Texas, Arlington, TX (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of Twente, Enschede (Netherlands)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1817613
- Alternate Identifier(s):
- OSTI ID: 1468843
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Materials
- Additional Journal Information:
- Journal Volume: 2; Journal Issue: 9; Journal ID: ISSN 2475-9953
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; domain walls; electrical conductivity; ferroelectric domains; structural order parameter; structural phase transition
Citation Formats
Cao, Ye, Li, Qian, Huijben, Mark, Vasudevan, Rama K., Kalinin, Sergei V., and Maksymovych, Petro. Electronic switching by metastable polarization states in BiFe O3 thin films. United States: N. p., 2018.
Web. doi:10.1103/physrevmaterials.2.094401.
Cao, Ye, Li, Qian, Huijben, Mark, Vasudevan, Rama K., Kalinin, Sergei V., & Maksymovych, Petro. Electronic switching by metastable polarization states in BiFe O3 thin films. United States. https://doi.org/10.1103/physrevmaterials.2.094401
Cao, Ye, Li, Qian, Huijben, Mark, Vasudevan, Rama K., Kalinin, Sergei V., and Maksymovych, Petro. Tue .
"Electronic switching by metastable polarization states in BiFe O3 thin films". United States. https://doi.org/10.1103/physrevmaterials.2.094401. https://www.osti.gov/servlets/purl/1817613.
@article{osti_1817613,
title = {Electronic switching by metastable polarization states in BiFe O3 thin films},
author = {Cao, Ye and Li, Qian and Huijben, Mark and Vasudevan, Rama K. and Kalinin, Sergei V. and Maksymovych, Petro},
abstractNote = {Here, we present an approach to control resistive switching in metal-ferroelectric contacts using a radially symmetric electric field. In ferroelectrics with significant polarization along the corresponding field lines, the field above a critical threshold will induce polarization discontinuity, a corresponding nanoscale volume of space charge, and a conducting junction. We demonstrate this principle using nanoscale polarization switching of a conventional (001)-oriented thin film of BiFeO3. Without any optimization, the conducting state created in this regime of resistive switching exhibits local currents of ~1–10nA, approaching the ~100nA threshold required for device implementation [J. Jiang et al., Nat. Mater. 17, 49 (2018)]. The corresponding electronic function is that of a volatile resistive switch, which is directly compatible with neuristor functionality that encodes the functioning basis of an axon [M. D. Pickett et al., Nat. Mater. 12, 114 (2013)]. Phase-field modeling further reveals that in the strongly charged local configuration, BiFeO3 locally undergoes a rhombohedral-tetragonal (R-T) phase transition, in part due to substantial piezoelectric expansion of the lattice. The estimated local charge density can be as high as ~1021cm-3, which would be extremely difficult to achieve by conventional doping approaches without altering other material properties. Therefore, this method for creating stable and reproducible strongly charged ferroelectric junctions enables more systematic studies of their physical properties, such as the possibility of structural and electronic phase transitions, and it can lead to new ferroelectric devices for advanced information functions.},
doi = {10.1103/physrevmaterials.2.094401},
journal = {Physical Review Materials},
number = 9,
volume = 2,
place = {United States},
year = {Tue Sep 04 00:00:00 EDT 2018},
month = {Tue Sep 04 00:00:00 EDT 2018}
}
Web of Science
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Works referencing / citing this record:
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