Stabilization of Sr3Al2OGrowth Templates for Ex Situ Synthesis of Freestanding Crystalline Oxide Membranes

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Carolina Adamo
  • Bai Yang Wang
  • Hyeok Yoon
  • Zhuoyu Chen
  • Seung Sae Hong
  • Di Lu
  • Yi Cui
  • Yasuyuki Hikita
  • Harold Y. Hwang

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)4454–4460
Journal / PublicationNano Letters
Online published14 May 2021
Publication statusPublished - 26 May 2021

Abstract

A new synthetic approach has recently been developed for the fabrication of freestanding crystalline perovskite oxide nanomembranes, which involves the epitaxial growth of a water-soluble sacrificial layer. By utilizing an ultrathin capping layer of SrTiO3, here we show that this sacrificial layer, as grown by pulsed laser deposition, can be stabilized in air and therefore be used as transferrable templates for ex situ epitaxial growth using other techniques. We find that the stability of these templates depends on the thickness of the capping layer. On these templates, freestanding superconducting SrTiO3 membranes were synthesized ex situ using molecular beam epitaxy, enabled by the lower growth temperature which preserves the sacrificial layer. This study paves the way for the synthesis of an expanded selection of freestanding oxide membranes and heterostructures with a wide variety of ex situ growth techniques.

Research Area(s)

  • ex situ synthesis, Freestanding oxide nanomembranes, MBE-grown SrTiO3, Sr3Al2O6 templates, superconductivity, water-soluble

Citation Format(s)

Stabilization of Sr3Al2OGrowth Templates for Ex Situ Synthesis of Freestanding Crystalline Oxide Membranes. / Li, Danfeng; Adamo, Carolina; Wang, Bai Yang; Yoon, Hyeok; Chen, Zhuoyu; Hong, Seung Sae; Lu, Di; Cui, Yi; Hikita, Yasuyuki; Hwang, Harold Y.

In: Nano Letters, 26.05.2021, p. 4454–4460.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review