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Title: Emergent chirality in the electric polarization texture of titanate superlattices

Authors:
ORCiD logo; ; ; ; ORCiD logo; ; ; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1417088
Grant/Contract Number:
AC02-05CH11231; SC0012375
Resource Type:
Journal Article: Published Article
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Volume: 115; Journal Issue: 5; Related Information: CHORUS Timestamp: 2018-01-30 18:43:25; Journal ID: ISSN 0027-8424
Publisher:
Proceedings of the National Academy of Sciences
Country of Publication:
United States
Language:
English

Citation Formats

Shafer, Padraic, García-Fernández, Pablo, Aguado-Puente, Pablo, Damodaran, Anoop R., Yadav, Ajay K., Nelson, Christopher T., Hsu, Shang-Lin, Wojdeł, Jacek C., Íñiguez, Jorge, Martin, Lane W., Arenholz, Elke, Junquera, Javier, and Ramesh, Ramamoorthy. Emergent chirality in the electric polarization texture of titanate superlattices. United States: N. p., 2018. Web. doi:10.1073/pnas.1711652115.
Shafer, Padraic, García-Fernández, Pablo, Aguado-Puente, Pablo, Damodaran, Anoop R., Yadav, Ajay K., Nelson, Christopher T., Hsu, Shang-Lin, Wojdeł, Jacek C., Íñiguez, Jorge, Martin, Lane W., Arenholz, Elke, Junquera, Javier, & Ramesh, Ramamoorthy. Emergent chirality in the electric polarization texture of titanate superlattices. United States. doi:10.1073/pnas.1711652115.
Shafer, Padraic, García-Fernández, Pablo, Aguado-Puente, Pablo, Damodaran, Anoop R., Yadav, Ajay K., Nelson, Christopher T., Hsu, Shang-Lin, Wojdeł, Jacek C., Íñiguez, Jorge, Martin, Lane W., Arenholz, Elke, Junquera, Javier, and Ramesh, Ramamoorthy. 2018. "Emergent chirality in the electric polarization texture of titanate superlattices". United States. doi:10.1073/pnas.1711652115.
@article{osti_1417088,
title = {Emergent chirality in the electric polarization texture of titanate superlattices},
author = {Shafer, Padraic and García-Fernández, Pablo and Aguado-Puente, Pablo and Damodaran, Anoop R. and Yadav, Ajay K. and Nelson, Christopher T. and Hsu, Shang-Lin and Wojdeł, Jacek C. and Íñiguez, Jorge and Martin, Lane W. and Arenholz, Elke and Junquera, Javier and Ramesh, Ramamoorthy},
abstractNote = {},
doi = {10.1073/pnas.1711652115},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 5,
volume = 115,
place = {United States},
year = 2018,
month = 1
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on July 30, 2018
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  • In this paper fatigue of ferroelectric polarization and the electric field induced strain is investigated in lead lanthanum zirconate titanate ceramics. Fatigue rate increases as the coercive field or the hysteretic nature of the electric field induced polarization of the ferroelectric ceramics increases. The ferroelectric polarization lost during fatigue can be partly restored by decreasing the frequency and increasing the amplitude of the applied ac electric field. The ferroelectric fatigue is modeled phenomenologically by an increase of the energy barrier for the ferroelectric switching and atomistically by a coupling of the spontaneous polarization with defects and/or space charge in themore » orientation of ferroelectric fatigue.« less
  • Oxide heterostructure superlattices constitute a new family of materials with tunable ferroelectric properties. While theoretical models predict the presence of nanosized ferroelectric domains in these films, they had not been observed as the magnitude of the response functions challenges the limits of experimental detection. Here, a new protocol in a precise variant of piezoforce microscopy is used to image domains in BaTiO3/SrTiO3 superlattices. Comparison of experimentally determined polarization to predictions of phase-field calculations is in quantitative agreement. Additionally, a combination of theory and experiment is used to determine the magnitude of internal electric field within the thin film, in amore » procedure that can be generalized to all ferroelectric films.« less
  • Here we report a novel twin polarization angle (TPA) approach in the quantitative chirality detection with the surface sum-frequency generation vibrational spectroscopy (SFG-VS). Generally, the achiral contribution dominates the surface SFG-VS signal, and the pure chiral signal is usually two or three orders of magnitude smaller. Therefore, it has been difficult to make quantitative detection and analysis of the chiral contributions to the surface SFG- VS signal. In the TPA method, by varying together the polarization angles of the incoming visible light and the sum frequency signal at fixed s or p polarization of the incoming infrared beam, the polarizationmore » dependent SFG signal can give not only direct signature of the chiral contribution in the total SFG-VS signal, but also the accurate measurement of the chiral and achiral components in the surface SFG signal. The general description of the TPA method is presented and the experiment test of the TPA approach is also presented for the SFG-VS from the S- and R-limonene chiral liquid surfaces. The most accurate degree of chiral excess values thus obtained for the 2878 cm⁻¹ spectral peak of the S- and R-limonene liquid surfaces are (23.7±0.4)% and ({25.4±1.3)%, respectively.« less