Strain Accommodation By Facile WO6 Octahedral Distortion and Tilting During WO3 Heteroepitaxy on SrTiO3(001)

Du, Yingge; Gu, Meng; Varga, Tamas; Wang, Chong M.; Bowden, Mark E.; Chambers, Scott A.

doi:10.1021/am5035686

Title: Strain Accommodation By Facile WO6 Octahedral Distortion and Tilting During WO3 Heteroepitaxy on SrTiO3(001)

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Abstract

In this paper, we show that compared to other BO6 octahedra in ABO3 structured perovskite oxides, the WO6 octahedra in tungsten trioxide (WO3) can withstand a much larger degree of distortion and tilting to accommodate interfacial strain, which in turn strongly impact the nucleation, structure, and defect formation during the epitaxial growth of WO3 on SrTiO3(001). A meta-stable tetragonal phase can be stabilized by epitaxy and a thickness dependent phase transition (tetragonal to monoclinic) is observed. In contrast to misfit dislocations to accommodate the interfacial stain, the facial WO6 octahedral distortion and tilting give rise to three types of planar defects that affect more than 15 monolayers from the interface. These atomically resolved, unusual interfacial defects may significantly alter the electronic, electrochromic, and mechanical properties of the epitaxial films.

Authors:: Du, Yingge; Gu, Meng; Varga, Tamas; Wang, Chong M.; Bowden, Mark E.; Chambers, Scott A.

Publication Date:: Wed Aug 27 00:00:00 EDT 2014

Research Org.:: Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1170068

Report Number(s):: PNNL-SA-102876
47862; 47621; KP1704020; KC0208010

DOE Contract Number:: AC05-76RL01830

Resource Type:: Journal Article

Journal Name:: ACS Applied Materials & Interfaces, 6(16):14253-14258

Additional Journal Information:: Journal Name: ACS Applied Materials & Interfaces, 6(16):14253-14258

Country of Publication:: United States

Language:: English

Subject:: WO3; Epitaxy; Tungsten Oxide; Octahedral distortion; SrTiO3; Environmental Molecular Sciences Laboratory

Citation Formats


                    Du, Yingge, Gu, Meng, Varga, Tamas, Wang, Chong M., Bowden, Mark E., and Chambers, Scott A. Strain Accommodation By Facile WO6 Octahedral Distortion and Tilting During WO3 Heteroepitaxy on SrTiO3(001).  United States: N. p., 2014. 
        Web.  doi:10.1021/am5035686.

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                    Du, Yingge, Gu, Meng, Varga, Tamas, Wang, Chong M., Bowden, Mark E., & Chambers, Scott A. Strain Accommodation By Facile WO6 Octahedral Distortion and Tilting During WO3 Heteroepitaxy on SrTiO3(001).  United States.  https://doi.org/10.1021/am5035686

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                    Du, Yingge, Gu, Meng, Varga, Tamas, Wang, Chong M., Bowden, Mark E., and Chambers, Scott A. 2014.  
        "Strain Accommodation By Facile WO6 Octahedral Distortion and Tilting During WO3 Heteroepitaxy on SrTiO3(001)".  United States.  https://doi.org/10.1021/am5035686.

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@article{osti_1170068,

  title        = {Strain Accommodation By Facile WO6 Octahedral Distortion and Tilting During WO3 Heteroepitaxy on SrTiO3(001)},

  author       = {Du, Yingge and Gu, Meng and Varga, Tamas and Wang, Chong M. and Bowden, Mark E. and Chambers, Scott A.},

  abstractNote = {In this paper, we show that compared to other BO6 octahedra in ABO3 structured perovskite oxides, the WO6 octahedra in tungsten trioxide (WO3) can withstand a much larger degree of distortion and tilting to accommodate interfacial strain, which in turn strongly impact the nucleation, structure, and defect formation during the epitaxial growth of WO3 on SrTiO3(001). A meta-stable tetragonal phase can be stabilized by epitaxy and a thickness dependent phase transition (tetragonal to monoclinic) is observed. In contrast to misfit dislocations to accommodate the interfacial stain, the facial WO6 octahedral distortion and tilting give rise to three types of planar defects that affect more than 15 monolayers from the interface. These atomically resolved, unusual interfacial defects may significantly alter the electronic, electrochromic, and mechanical properties of the epitaxial films.},

  doi          = {10.1021/am5035686},

  url          = {https://www.osti.gov/biblio/1170068},
  journal      = {ACS Applied Materials & Interfaces, 6(16):14253-14258},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Wed Aug 27 00:00:00 EDT 2014},

  month        = {Wed Aug 27 00:00:00 EDT 2014}

}

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