Oxygen octahedral distortions in LaMO3/SrTiO3 superlattices

Sanchez-Santolino, Gabriel; Cabero, Mariona; Varela, Maria; Garcia-Barriocanal, Javier; Leon, Carlos; Pennycook, Stephen J.; Santamaria, Jacobo

doi:10.1017/S1431927614000750

Title: Oxygen octahedral distortions in LaMO₃/SrTiO₃ superlattices

Abstract

Here we study the interfaces between the Mott insulator LaMnO₃ (LMO) and the band insulator SrTiO₃ (STO) in epitaxially grown superlattices with different thickness ratios and different transport and magnetic behaviors. Using atomic resolution electron energy-loss spectrum imaging, we analyze simultaneously the structural and chemical properties of these interfaces. We find changes in the oxygen octahedral tilts within the LaMnO₃ layers when the thickness ratio between the manganite and the titanate layers is varied. Superlattices with thick LMO and ultrathin STO layers present unexpected octahedral tilts in the STO, along with a small amount of oxygen vacancies. On the other hand, thick STO layers exhibit undistorted octahedra while the LMO layers present reduced O octahedral distortions near the interfaces. In conclusion, these findings will be discussed in view of the transport and magnetic differences found in previous studies.

Authors:

Sanchez-Santolino, Gabriel ^[1]; Cabero, Mariona ^[1]; Varela, Maria ^[2]; Garcia-Barriocanal, Javier ^[1]; Leon, Carlos ^[1]; Pennycook, Stephen J. ^[3]; Santamaria, Jacobo ^[1]

Univ. Complutense de Madrid, Madrid (Spain)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. Complutense de Madrid, Madrid (Spain)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: Thu Apr 24 00:00:00 EDT 2014

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1162066

Grant/Contract Number:: AC05-00OR22725; MAT2011-27470-C02; S2009/MAT-1756; 239739 STEMOX

Resource Type:: Accepted Manuscript

Journal Name:: Microscopy and Microanalysis

Additional Journal Information:: Journal Volume: 20; Journal Issue: 03; Journal ID: ISSN 1431-9276

Publisher:: Microscopy Society of America (MSA)

Country of Publication:: United States

Language:: English

Subject:: 74 ATOMIC AND MOLECULAR PHYSICS; scanning transmission electron microscopy; electron energy loss spectroscopy; complex oxides; spectrum imaging; manganites; oxygen octahedral tilts; oxygen vacancies

Citation Formats


                    Sanchez-Santolino, Gabriel, Cabero, Mariona, Varela, Maria, Garcia-Barriocanal, Javier, Leon, Carlos, Pennycook, Stephen J., and Santamaria, Jacobo. Oxygen octahedral distortions in LaMO3/SrTiO3 superlattices.  United States: N. p., 2014. 
Web.  doi:10.1017/S1431927614000750.

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                    Sanchez-Santolino, Gabriel, Cabero, Mariona, Varela, Maria, Garcia-Barriocanal, Javier, Leon, Carlos, Pennycook, Stephen J., & Santamaria, Jacobo. Oxygen octahedral distortions in LaMO3/SrTiO3 superlattices.  United States.  https://doi.org/10.1017/S1431927614000750

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                    Sanchez-Santolino, Gabriel, Cabero, Mariona, Varela, Maria, Garcia-Barriocanal, Javier, Leon, Carlos, Pennycook, Stephen J., and Santamaria, Jacobo. Thu .  
"Oxygen octahedral distortions in LaMO3/SrTiO3 superlattices".  United States.  https://doi.org/10.1017/S1431927614000750.  https://www.osti.gov/servlets/purl/1162066.

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@article{osti_1162066,

  title        = {Oxygen octahedral distortions in LaMO3/SrTiO3 superlattices},

  author       = {Sanchez-Santolino, Gabriel and Cabero, Mariona and Varela, Maria and Garcia-Barriocanal, Javier and Leon, Carlos and Pennycook, Stephen J. and Santamaria, Jacobo},

  abstractNote = {Here we study the interfaces between the Mott insulator LaMnO3 (LMO) and the band insulator SrTiO3 (STO) in epitaxially grown superlattices with different thickness ratios and different transport and magnetic behaviors. Using atomic resolution electron energy-loss spectrum imaging, we analyze simultaneously the structural and chemical properties of these interfaces. We find changes in the oxygen octahedral tilts within the LaMnO3 layers when the thickness ratio between the manganite and the titanate layers is varied. Superlattices with thick LMO and ultrathin STO layers present unexpected octahedral tilts in the STO, along with a small amount of oxygen vacancies. On the other hand, thick STO layers exhibit undistorted octahedra while the LMO layers present reduced O octahedral distortions near the interfaces. In conclusion, these findings will be discussed in view of the transport and magnetic differences found in previous studies.},

  doi          = {10.1017/S1431927614000750},

  journal      = {Microscopy and Microanalysis},

  number       = 03,

  volume       = 20,

  place        = {United States},

  year         = {Thu Apr 24 00:00:00 EDT 2014},

  month        = {Thu Apr 24 00:00:00 EDT 2014}

}

Copy to clipboard

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Title: Oxygen octahedral distortions in LaMO3/SrTiO3 superlattices

Abstract

Citation Formats

Atomic-resolution chemical analysis using a scanning transmission electron microscope journal, November 1993

STEM-EELS imaging of complex oxides and interfaces journal, January 2012

“Charge Leakage” at LaMnO 3 /SrTiO 3 Interfaces journal, February 2010

Two-Dimensional Mapping of Chemical Information at Atomic Resolution journal, August 2007

Oxygen octahedron reconstruction in the SrTiO 3 / LaAlO 3 heterointerfaces investigated using aberration-corrected ultrahigh-resolution transmission electron microscopy journal, February 2009

Oxide Nanoelectronics on Demand journal, February 2009

Interplay of Octahedral Tilts and Polar Order in BiFeO 3 Films journal, March 2013

Tailoring Interface Structure in Highly Strained YSZ/STO Heterostructures journal, October 2011

Interface Physics in Complex Oxide Heterostructures journal, March 2011

Suppression of Octahedral Tilts and Associated Changes in Electronic Properties at Epitaxial Oxide Heterostructure Interfaces journal, August 2010

Electric field control of the LaAlO3/SrTiO3 interface ground state journal, December 2008

Band Gap and Edge Engineering via Ferroic Distortion and Anisotropic Strain: The Case of SrTiO 3 journal, September 2011

Enhanced ordering temperatures in antiferromagnetic manganite superlattices journal, October 2009

Mapping chemical and bonding information using multivariate analysis of electron energy-loss spectrum images journal, October 2006

Colossal Ionic Conductivity at Interfaces of Epitaxial ZrO2:Y2O3/SrTiO3 Heterostructures journal, August 2008

A high-mobility electron gas at the LaAlO3/SrTiO3 heterointerface journal, January 2004

Tunable Quasi-Two-Dimensional Electron Gases in Oxide Heterostructures journal, September 2006

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Superconducting Interfaces Between Insulating Oxides journal, August 2007

Electronic Reconstruction at SrMnO 3 − LaMnO 3 Superlattice Interfaces journal, November 2007

An electron microscope for the aberration-corrected era journal, February 2008

Intracell Changes in Epitaxially Strained YBa 2 Cu 3 O 7 − x Ultrathin Layers in YBa 2 Cu 3 O 7 − x / PrBa 2 Cu 3 O 7 Superlattices journal, November 1999

Anti-ferrodistortive-Like Oxygen-Octahedron Rotation Induced by the Oxygen Vacancy in Cubic SrTiO 3 journal, October 2012

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The crystal structure of lanthanum manganate(iii), LaMnO3, at room temperature and at 1273 K under N2 journal, October 1995

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Title: Oxygen octahedral distortions in LaMO₃/SrTiO₃ superlattices

Atomic-resolution chemical analysis using a scanning transmission electron microscope
journal, November 1993

STEM-EELS imaging of complex oxides and interfaces
journal, January 2012

“Charge Leakage” at LaMnO ₃ /SrTiO ₃ Interfaces
journal, February 2010

Two-Dimensional Mapping of Chemical Information at Atomic Resolution
journal, August 2007

Oxygen octahedron reconstruction in the ${SrTiO}_{3} / {LaAlO}_{3}$ heterointerfaces investigated using aberration-corrected ultrahigh-resolution transmission electron microscopy
journal, February 2009

Oxide Nanoelectronics on Demand
journal, February 2009

Interplay of Octahedral Tilts and Polar Order in BiFeO ₃ Films
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Tailoring Interface Structure in Highly Strained YSZ/STO Heterostructures
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Interface Physics in Complex Oxide Heterostructures
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Suppression of Octahedral Tilts and Associated Changes in Electronic Properties at Epitaxial Oxide Heterostructure Interfaces
journal, August 2010

Electric field control of the LaAlO3/SrTiO3 interface ground state
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Band Gap and Edge Engineering via Ferroic Distortion and Anisotropic Strain: The Case of ${SrTiO}_{3}$
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Enhanced ordering temperatures in antiferromagnetic manganite superlattices
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Superconducting Interfaces Between Insulating Oxides
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Electronic Reconstruction at ${SrMnO}_{3} − {LaMnO}_{3}$ Superlattice Interfaces
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An electron microscope for the aberration-corrected era
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Intracell Changes in Epitaxially Strained ${YBa}_{2} {Cu}_{3} O_{7 - x}$ Ultrathin Layers in ${YBa}_{2} {Cu}_{3} O_{7 - x} / {PrBa}_{2} {Cu}_{3} O_{7}$ Superlattices
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Anti-ferrodistortive-Like Oxygen-Octahedron Rotation Induced by the Oxygen Vacancy in Cubic SrTiO ₃
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Epitaxial BiFeO₃ Multiferroic Thin Film Heterostructures
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Strong coupling of Jahn-Teller distortion to oxygen-octahedron rotation and functional properties in epitaxially strained orthorhombic LaMnO $_{3}$
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