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

Baek, David J.; Lu, Di; Hikita, Yasuyuki; Hwang, Harold Y.; Kourkoutis, Lena F.

doi:10.1021/acsami.6b14106

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

Journal Article · Thu Dec 22 00:00:00 EST 2016 · ACS Applied Materials and Interfaces

DOI:https://doi.org/10.1021/acsami.6b14106· OSTI ID:1338292

^[1]; Lu, Di ^[2]; Hikita, Yasuyuki ^[3]; Hwang, Harold Y. ^[4]; Kourkoutis, Lena F. ^[1]

Cornell Univ., Ithaca, NY (United States)
Stanford Univ., Stanford, CA (United States)
SLAC National Accelerator Lab., Menlo Park, CA (United States)
SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., Stanford, CA (United States)

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.

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Research Organization:: Stanford Univ., CA (United States)

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

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1338292

Journal Information:: ACS Applied Materials and Interfaces, Vol. 9, Issue 1; ISSN 1944-8244

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 18 works

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Self-assembled multiferroic perovskite–spinel nanocomposite thin films: epitaxial growth, templating and integration on silicon Kim, Dong Hun; Ning, Shuai; Ross, Caroline A. Journal of Materials Chemistry C, Vol. 7, Issue 30 https://doi.org/10.1039/c9tc02033k	journal	January 2019
The impact of tilt grain boundaries on the thermal transport in perovskite SrTiO ₃ layered nanostructures. A computational study Yeandel, Stephen R.; Molinari, Marco; Parker, Stephen C. Nanoscale, Vol. 10, Issue 31 https://doi.org/10.1039/c8nr02234h	journal	January 2018
Extreme tensile strain states in La _0.7 Ca _0.3 MnO ₃ membranes Hong, Seung Sae; Gu, Mingqiang; Verma, Manish Science, Vol. 368, Issue 6486 https://doi.org/10.1126/science.aax9753	journal	April 2020

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