Order-Disorder Ferroelectric Transition of Strained SrTiO3

Salmani-Rezaie, Salva; Ahadi, Kaveh; Strickland, William  M.; Stemmer, Susanne

doi:10.1103/physrevlett.125.087601

Title: Order-Disorder Ferroelectric Transition of Strained SrTiO₃

Abstract

SrTiO₃ is an incipient ferroelectric that is believed to exhibit a prototype displacive, soft mode ferroelectric transition when subjected to mechanical stress or alloying. We use high-angle annular dark field imaging in scanning transmission electron microscopy to reveal local polar regions in the room temperature, paraelectric phase of strained SrTiO₃ films, which undergo a ferroelectric transition at low temperatures. These films contain nanometer-sized domains in which the Ti columns are displaced. In contrast, these nanodomains are absent in unstrained films, which do not become ferroelectric. Here, the results show that the ferroelectric transition of strained SrTiO₃ is an order-disorder transition. We discuss the impact of the results on the nature of the ferroelectric transition of SrTiO₃.

Authors:

Salmani-Rezaie, Salva ^[1]; Ahadi, Kaveh ^[1];

^[1]; Stemmer, Susanne ^[1]

University of California, Santa Barbara, CA (United States)

Publication Date:: Thu Aug 20 00:00:00 EDT 2020

Research Org.:: Univ. of California, Santa Barbara, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; US Army Research Office (ARO); National Science Foundation (NSF)

OSTI Identifier:: 1649782

Grant/Contract Number:: FG02-02ER45994; W911NF-16-1-0361; DMR 1720256

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Volume: 125; Journal Issue: 8; Journal ID: ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; Phase transitions; ferroelectrics; scanning transmission electron microscopy

Citation Formats


                    Salmani-Rezaie, Salva, Ahadi, Kaveh, Strickland, William  M., and Stemmer, Susanne. Order-Disorder Ferroelectric Transition of Strained SrTiO3.  United States: N. p., 2020. 
Web.  doi:10.1103/physrevlett.125.087601.

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                    Salmani-Rezaie, Salva, Ahadi, Kaveh, Strickland, William  M., & Stemmer, Susanne. Order-Disorder Ferroelectric Transition of Strained SrTiO3.  United States.  https://doi.org/10.1103/physrevlett.125.087601

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                    Salmani-Rezaie, Salva, Ahadi, Kaveh, Strickland, William  M., and Stemmer, Susanne. Thu .  
"Order-Disorder Ferroelectric Transition of Strained SrTiO3".  United States.  https://doi.org/10.1103/physrevlett.125.087601.  https://www.osti.gov/servlets/purl/1649782.

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@article{osti_1649782,

  title        = {Order-Disorder Ferroelectric Transition of Strained SrTiO3},

  author       = {Salmani-Rezaie, Salva and Ahadi, Kaveh and Strickland, William  M. and Stemmer, Susanne},

  abstractNote = {SrTiO3 is an incipient ferroelectric that is believed to exhibit a prototype displacive, soft mode ferroelectric transition when subjected to mechanical stress or alloying. We use high-angle annular dark field imaging in scanning transmission electron microscopy to reveal local polar regions in the room temperature, paraelectric phase of strained SrTiO3 films, which undergo a ferroelectric transition at low temperatures. These films contain nanometer-sized domains in which the Ti columns are displaced. In contrast, these nanodomains are absent in unstrained films, which do not become ferroelectric. Here, the results show that the ferroelectric transition of strained SrTiO3 is an order-disorder transition. We discuss the impact of the results on the nature of the ferroelectric transition of SrTiO3.},

  doi          = {10.1103/physrevlett.125.087601},

  journal      = {Physical Review Letters},

  number       = 8,

  volume       = 125,

  place        = {United States},

  year         = {Thu Aug 20 00:00:00 EDT 2020},

  month        = {Thu Aug 20 00:00:00 EDT 2020}

}

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Strain and ferroelectric soft-mode induced superconductivity in strontium titanate
journal, April 2018

Ferroelectricity Induced by Oxygen Isotope Exchange in Strontium Titanate Perovskite
journal, April 1999

Raman scattering of ferroelectric Sr _1-x Ca _x TiO ₃ , x=0.007
journal, February 1994

The chain structure of BaTiO3 and KNbO3
journal, October 1968

Quantum Critical Origin of the Superconducting Dome in ${SrTiO}_{3}$
journal, December 2015

Stoichiometry as key to ferroelectricity in compressively strained SrTiO ₃ films
journal, July 2016

Picometre-precision analysis of scanning transmission electron microscopy images of platinum nanocatalysts
journal, June 2014

Enhanced superconductivity close to a non-magnetic quantum critical point in electron-doped strontium titanate
journal, February 2019

Character of Order-Disorder and Displacive Components in Barium Titanate
journal, July 2004

Spin-orbit-coupled ferroelectric superconductivity
journal, July 2018

Growth of high-quality SrTiO3 films using a hybrid molecular beam epitaxy approach
journal, May 2009

Direct observation of charge mediated lattice distortions in complex oxide solid solutions
journal, February 2015

Direct observation of the symmetry breaking of the nanometer-scale local structure in the paraelectric cubic phase of BaTiO ₃ using convergent-beam electron diffraction
journal, June 2016

Nanoscale symmetry fluctuations in ferroelectric barium titanate, BaTiO ₃
journal, July 2017

A tight-binding model of the oxygen-vacancy in SrTiO ₃
journal, May 1983

NMR study of disorder in $Ba Ti O_{3}$ and $Sr Ti O_{3}$
journal, February 2005

SrTi $O_{3}$ : An intrinsic quantum paraelectric below 4 K
journal, April 1979

${Sr}_{1 - x} {Ca}_{x} Ti O_{3}$ : An $XY$ Quantum Ferroelectric with Transition to Randomness
journal, June 1984

Topological superconductivity and unconventional pairing in oxide interfaces
journal, January 2015

Local structure and the phase transitions of BaTiO ₃
journal, February 1998

Indication for a novel phase in the quantum paraelectric regime of SrTiO3
journal, June 1991