Loading...
Terahertz reading of ferroelectric domain wall dielectric switching
Zhang, Man Chen, Zhe Yue, Yajun Chen, Tao Yan, Zhongna Jiang, Qinghui Yang, Bin Eriksson, Mirva Tang, Jianhua Zhang, Dou
Zhang, Man
Chen, Zhe
Yue, Yajun
Chen, Tao
Yan, Zhongna
Jiang, Qinghui
Yang, Bin
Eriksson, Mirva
Tang, Jianhua
Zhang, Dou
Advisors
Editors
Other Contributors
EPub Date
Publication Date
2021-03-08
Submitted Date
Collections
Files
Loading...
Main article
Adobe PDF, 595.36 KB
Other Titles
Abstract
Ferroelectric domain walls (DWs) are important nano scale interfaces between two domains. It is widely accepted that ferroelectric domain walls work idly at terahertz (THz) frequencies, consequently discouraging efforts to engineer the domain walls to create new applications that utilise THz radiation. However, the present work clearly demonstrates the activity of domain walls at THz frequencies in a lead free Aurivillius phase ferroelectric ceramic, Ca0.99Rb0.005Ce0.005Bi2Nb2O9, examined using THz time domain spectroscopy (THz-TDS). The dynamics of domain walls are different at kHz and THz frequencies. At low frequencies, domain walls work as a group to increase dielectric permittivity. At THz frequencies, the defective nature of domain walls serves to lower the overall dielectric permittivity. This is evidenced by higher dielectric permittivity in the THz band after poling, reflecting decreased domain wall density. An elastic vibrational model has also been used to verify that a single frustrated dipole in a domain wall represents a weaker contribution to the permittivity than its counterpart within a domain. The work represents a fundamental breakthrough in understanding dielectric contributions of domain walls at THz frequencies. It also demonstrates that THz probing can be used to read domain wall dielectric switching.
Citation
Zhang, M., Chen, Z., Yue, Y., Chen, T., Yan, Z., Jiang, Q., ... Yan, H. (2021). Terahertz reading of ferroelectric domain wall dielectric switching. ACS Applied Materials & Interfaces, 13(10), 12622-12628. https://doi.org/10.1021/acsami.1c00523
Publisher
American Chemical Society
Journal
ACS Applied Materials and Interfaces
Research Unit
DOI
10.1021/acsami.1c00523
PubMed ID
PubMed Central ID
Type
Article
Language
Description
“This document is the Accepted Manuscript version of a Published Work that appeared in final form in [ACS Applied Materials and Interfaces], copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/full/10.1021/acsami.1c00523
Series/Report no.
ISSN
1944-8244
EISSN
1944-8252