Interface effect on ferroelectricity at the nanoscale

Chun Gang Duan; Renat F. Sabirianov; Wai Ning Mei; Sitaram S. Jaswal; Evgeny Y. Tsymbal

doi:10.1021/nl052452l

Interface effect on ferroelectricity at the nanoscale

Chun Gang Duan
, Renat F. Sabirianov
, Wai Ning Mei
, Sitaram S. Jaswal
, Evgeny Y. Tsymbal^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

184 Scopus citations

Abstract

Interfaces play a critical role in nanoscale ferroelectricity. We perform a first-principles study of ultrathin KNbO ₃ ferroelectric films placed between two metal electrodes, either SrRuO ₃ or Pt. We show that bonding at the ferroelectric-metal interfaces imposes severe constraints on the displacement of atoms, destroying the bulk tetragonal soft mode. If the interface bonding is sufficiently strong, the ground-state represents a ferroelectric domain with an interface domain wall, driven by the intrinsic oppositely oriented dipole moments at the two interfaces. The critical thickness for the net polarization of the KNbO ₃ film is predicted to be about 1 nm for Pt and 1.8 nm for SrRuO ₃ electrodes.

Original language	English
Pages (from-to)	483-487
Number of pages	5
Journal	Nano Letters
Volume	6
Issue number	3
DOIs	https://doi.org/10.1021/nl052452l
State	Published - Mar 2006
Externally published	Yes

Access to Document

10.1021/nl052452l

Cite this

@article{b77d4832fd1c4de38987fff89271bb7d,

title = "Interface effect on ferroelectricity at the nanoscale",

abstract = "Interfaces play a critical role in nanoscale ferroelectricity. We perform a first-principles study of ultrathin KNbO 3 ferroelectric films placed between two metal electrodes, either SrRuO 3 or Pt. We show that bonding at the ferroelectric-metal interfaces imposes severe constraints on the displacement of atoms, destroying the bulk tetragonal soft mode. If the interface bonding is sufficiently strong, the ground-state represents a ferroelectric domain with an interface domain wall, driven by the intrinsic oppositely oriented dipole moments at the two interfaces. The critical thickness for the net polarization of the KNbO 3 film is predicted to be about 1 nm for Pt and 1.8 nm for SrRuO 3 electrodes.",

author = "Duan, \{Chun Gang\} and Sabirianov, \{Renat F.\} and Mei, \{Wai Ning\} and Jaswal, \{Sitaram S.\} and Tsymbal, \{Evgeny Y.\}",

year = "2006",

month = mar,

doi = "10.1021/nl052452l",

language = "英语",

volume = "6",

pages = "483--487",

journal = "Nano Letters",

issn = "1530-6984",

publisher = "American Chemical Society",

number = "3",

}

TY - JOUR

T1 - Interface effect on ferroelectricity at the nanoscale

AU - Duan, Chun Gang

AU - Sabirianov, Renat F.

AU - Mei, Wai Ning

AU - Jaswal, Sitaram S.

AU - Tsymbal, Evgeny Y.

PY - 2006/3

Y1 - 2006/3

N2 - Interfaces play a critical role in nanoscale ferroelectricity. We perform a first-principles study of ultrathin KNbO 3 ferroelectric films placed between two metal electrodes, either SrRuO 3 or Pt. We show that bonding at the ferroelectric-metal interfaces imposes severe constraints on the displacement of atoms, destroying the bulk tetragonal soft mode. If the interface bonding is sufficiently strong, the ground-state represents a ferroelectric domain with an interface domain wall, driven by the intrinsic oppositely oriented dipole moments at the two interfaces. The critical thickness for the net polarization of the KNbO 3 film is predicted to be about 1 nm for Pt and 1.8 nm for SrRuO 3 electrodes.

AB - Interfaces play a critical role in nanoscale ferroelectricity. We perform a first-principles study of ultrathin KNbO 3 ferroelectric films placed between two metal electrodes, either SrRuO 3 or Pt. We show that bonding at the ferroelectric-metal interfaces imposes severe constraints on the displacement of atoms, destroying the bulk tetragonal soft mode. If the interface bonding is sufficiently strong, the ground-state represents a ferroelectric domain with an interface domain wall, driven by the intrinsic oppositely oriented dipole moments at the two interfaces. The critical thickness for the net polarization of the KNbO 3 film is predicted to be about 1 nm for Pt and 1.8 nm for SrRuO 3 electrodes.

UR - https://www.scopus.com/pages/publications/33645410299

U2 - 10.1021/nl052452l

DO - 10.1021/nl052452l

M3 - 文章

AN - SCOPUS:33645410299

SN - 1530-6984

VL - 6

SP - 483

EP - 487

JO - Nano Letters

JF - Nano Letters

IS - 3

ER -

Interface effect on ferroelectricity at the nanoscale

Abstract

Access to Document

Other files and links

Fingerprint

Cite this