Freestanding crystalline $\mathrm{YB}{\mathrm{a}}_{2}\mathrm{C}{\mathrm{u}}_{3}{\mathrm{O}}_{7\ensuremath{-}x}$ heterostructure membranes

Rapid Communication

Freestanding crystalline $YB a_{2} C u_{3} O_{7 - x}$ heterostructure membranes

Zhuoyu Chen, Bai Yang Wang, Berit H. Goodge, Di Lu, Seung Sae Hong, Danfeng Li, Lena F. Kourkoutis, Yasuyuki Hikita, and Harold Y. Hwang

Phys. Rev. Materials 3, 060801(R) – Published 24 June 2019

Abstract

We report the synthesis of millimeter-sized freestanding single-crystal $YB a_{2} C u_{3} O_{7 - x}$ heterostructure membranes with nanoscale thickness. On a $SrTi O_{3}$ substrate, a heteroepitaxial water-soluble sacrificial layer of $S r_{3} A l_{2} O_{6}$ followed by an encapsulated $YB a_{2} C u_{3} O_{7 - x}$ film is grown by pulsed laser deposition. A freestanding $YB a_{2} C u_{3} O_{7 - x}$ heterostructure membrane is obtained by etching the sacrificial layer. Its high crystalline quality is demonstrated via x-ray diffraction, electrical measurements, and scanning transmission electron microscopy.

Received 2 April 2018

DOI:https://doi.org/10.1103/PhysRevMaterials.3.060801

Physics Subject Headings (PhySH)

Superconductivity

Epitaxy Etching Grazing-incidence X-ray diffraction Laser ablation Resistivity measurements X-ray diffraction

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Zhuoyu Chen ^1,2,*,†, Bai Yang Wang^1,*, Berit H. Goodge^3,4, Di Lu^1,2, Seung Sae Hong^1,2, Danfeng Li^1,2, Lena F. Kourkoutis^3,4, Yasuyuki Hikita², and Harold Y. Hwang^1,2,‡

¹Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, California 94305, USA
²Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
³School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA
⁴Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, USA