Understanding and predicting geometrical constraint ferroelectric charged domain walls in a BiFeO3 island via phase-field simulations
Abstract
It has been known that ferroelectric charged domain walls (CDWs), which break the polarization continuity, may be electrically active with an elevated conductivity. However, the bound charge at CDWs may render them energetically unstable, and thus, forming CDWs naturally and manipulating them electrically is still challenging. Here, we theoretically utilize phase-field simulations to design spontaneously generated CDWs with center-type quad-domains in a single square-shaped BiFeO3 nanoisland. It is shown that the stability of the spontaneously emerging head-to-head domain walls with center-convergent quad-domains is mainly determined by three contributions, namely, the geometrical constraint from approximately 45°-tilted bottom edges, the electric boundary condition, and the necessary screening free charges to compensate head-to-head domain walls. It is demonstrated that the center-convergent quad-domains with head-to-head CDWs can be electrically switched to the center-divergent one with tail-to-tail CDWs, providing guidance for achieving ferroelectric domain-wall-based nanodevices with low-power dissipation.
- Authors:
-
[3];
[1];
- Tsinghua Univ., Beijing (China)
- Pennsylvania State Univ., University Park, PA (United States). Dept. of Material Sciences and Engineering
- Beijing Inst. of Technology (China)
- Tsinghua Univ., Beijing (China); Pennsylvania State Univ., University Park, PA (United States). Dept. of Material Sciences and Engineering
- Publication Date:
- Research Org.:
- Pennsylvania State Univ., University Park, PA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1609866
- Grant/Contract Number:
- FG02-07ER46417
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Volume: 113; Journal Issue: 22; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Physics; Chemical thermodynamics; Ferroelectric materials; Mathematical modeling; Algebraic topology; Nanomaterials; Elastic energy; Nanoelectronics
Citation Formats
Peng, Ren-Ci, Cheng, Xiaoxing, Ma, Ji, Huang, Houbing, Ma, Jing, Chen, Long-Qing, and Nan, Ce-Wen. Understanding and predicting geometrical constraint ferroelectric charged domain walls in a BiFeO3 island via phase-field simulations. United States: N. p., 2018.
Web. doi:10.1063/1.5050802.
Peng, Ren-Ci, Cheng, Xiaoxing, Ma, Ji, Huang, Houbing, Ma, Jing, Chen, Long-Qing, & Nan, Ce-Wen. Understanding and predicting geometrical constraint ferroelectric charged domain walls in a BiFeO3 island via phase-field simulations. United States. https://doi.org/10.1063/1.5050802
Peng, Ren-Ci, Cheng, Xiaoxing, Ma, Ji, Huang, Houbing, Ma, Jing, Chen, Long-Qing, and Nan, Ce-Wen. Mon .
"Understanding and predicting geometrical constraint ferroelectric charged domain walls in a BiFeO3 island via phase-field simulations". United States. https://doi.org/10.1063/1.5050802. https://www.osti.gov/servlets/purl/1609866.
@article{osti_1609866,
title = {Understanding and predicting geometrical constraint ferroelectric charged domain walls in a BiFeO3 island via phase-field simulations},
author = {Peng, Ren-Ci and Cheng, Xiaoxing and Ma, Ji and Huang, Houbing and Ma, Jing and Chen, Long-Qing and Nan, Ce-Wen},
abstractNote = {It has been known that ferroelectric charged domain walls (CDWs), which break the polarization continuity, may be electrically active with an elevated conductivity. However, the bound charge at CDWs may render them energetically unstable, and thus, forming CDWs naturally and manipulating them electrically is still challenging. Here, we theoretically utilize phase-field simulations to design spontaneously generated CDWs with center-type quad-domains in a single square-shaped BiFeO3 nanoisland. It is shown that the stability of the spontaneously emerging head-to-head domain walls with center-convergent quad-domains is mainly determined by three contributions, namely, the geometrical constraint from approximately 45°-tilted bottom edges, the electric boundary condition, and the necessary screening free charges to compensate head-to-head domain walls. It is demonstrated that the center-convergent quad-domains with head-to-head CDWs can be electrically switched to the center-divergent one with tail-to-tail CDWs, providing guidance for achieving ferroelectric domain-wall-based nanodevices with low-power dissipation.},
doi = {10.1063/1.5050802},
journal = {Applied Physics Letters},
number = 22,
volume = 113,
place = {United States},
year = {Mon Nov 26 00:00:00 EST 2018},
month = {Mon Nov 26 00:00:00 EST 2018}
}
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Works referencing / citing this record:
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