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Title: Ultrathin epitaxial barrier layer to avoid thermally induced phase transformation in oxide heterostructures

Abstract

Incorporating oxides with radically different physical and chemical properties into heterostructures offers tantalizing possibilities to derive new functions and structures. Recently, we have fabricated freestanding 2D oxide membranes using the water-soluble perovskite Sr3Al2O6 as a sacrificial buffer layer. Here, with atomic-resolution spectroscopic imaging, we observe that direct growth of oxide thin films on Sr3Al2O6 can cause complete phase transformation of the buffer layer, rendering it water-insoluble. More importantly, we demonstrate that an ultrathin SrTiO3 layer can be employed as an effective barrier to preserve Sr3Al2O6 during subsequent growth, thus allowing its integration in a wider range of oxide heterostructures.

Authors:
ORCiD logo [1];  [2];  [3];  [4];  [1]
+ Show Author Affiliations
  1. Cornell Univ., Ithaca, NY (United States)
  2. Stanford Univ., Stanford, CA (United States)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., Stanford, CA (United States)
Publication Date:
Research Org.:
Stanford Univ., CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1338292
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; oxide heterostructures; soft oxides; thermal stability; STEM-EELS; buffer layers

Citation Formats

Baek, David J., Lu, Di, Hikita, Yasuyuki, Hwang, Harold Y., and Kourkoutis, Lena F. Ultrathin epitaxial barrier layer to avoid thermally induced phase transformation in oxide heterostructures. United States: N. p., 2016. Web. doi:10.1021/acsami.6b14106.
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Baek, David J., Lu, Di, Hikita, Yasuyuki, Hwang, Harold Y., & Kourkoutis, Lena F. Ultrathin epitaxial barrier layer to avoid thermally induced phase transformation in oxide heterostructures. United States. https://doi.org/10.1021/acsami.6b14106
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Baek, David J., Lu, Di, Hikita, Yasuyuki, Hwang, Harold Y., and Kourkoutis, Lena F. Thu . "Ultrathin epitaxial barrier layer to avoid thermally induced phase transformation in oxide heterostructures". United States. https://doi.org/10.1021/acsami.6b14106. https://www.osti.gov/servlets/purl/1338292.
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@article{osti_1338292,
title = {Ultrathin epitaxial barrier layer to avoid thermally induced phase transformation in oxide heterostructures},
author = {Baek, David J. and Lu, Di and Hikita, Yasuyuki and Hwang, Harold Y. and Kourkoutis, Lena F.},
abstractNote = {Incorporating oxides with radically different physical and chemical properties into heterostructures offers tantalizing possibilities to derive new functions and structures. Recently, we have fabricated freestanding 2D oxide membranes using the water-soluble perovskite Sr3Al2O6 as a sacrificial buffer layer. Here, with atomic-resolution spectroscopic imaging, we observe that direct growth of oxide thin films on Sr3Al2O6 can cause complete phase transformation of the buffer layer, rendering it water-insoluble. More importantly, we demonstrate that an ultrathin SrTiO3 layer can be employed as an effective barrier to preserve Sr3Al2O6 during subsequent growth, thus allowing its integration in a wider range of oxide heterostructures.},
doi = {10.1021/acsami.6b14106},
journal = {ACS Applied Materials and Interfaces},
number = 1,
volume = 9,
place = {United States},
year = {Thu Dec 22 00:00:00 EST 2016},
month = {Thu Dec 22 00:00:00 EST 2016}
}
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Journal Article:
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https://doi.org/10.1021/acsami.6b14106
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    Self-assembled multiferroic perovskite–spinel nanocomposite thin films: epitaxial growth, templating and integration on silicon
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    • Kim, Dong Hun; Ning, Shuai; Ross, Caroline A.
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    • DOI: 10.1039/c9tc02033k

    The impact of tilt grain boundaries on the thermal transport in perovskite SrTiO 3 layered nanostructures. A computational study
    journal, January 2018

    • Yeandel, Stephen R.; Molinari, Marco; Parker, Stephen C.
    • Nanoscale, Vol. 10, Issue 31
    • DOI: 10.1039/c8nr02234h

    Extreme tensile strain states in La 0.7 Ca 0.3 MnO 3 membranes
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