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Strain mismatch induced tilted heteroepitaxial (000l) hexagonal ZnO films on (001) cubic substrates

Kang, BS and Stan, L and Usov, IO and Lee, JK and Harriman, TA and Lucca, DA and Depaula, RF and Arendt, PN and Nastasi, M and MacManus-Driscoll, JL and Park, BH and Jia, Q (2011) Strain mismatch induced tilted heteroepitaxial (000l) hexagonal ZnO films on (001) cubic substrates. Advanced Engineering Materials, 13 (12). 1142 - 1145. ISSN 1438-1656

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Abstract

A novel strain mismatch induced tilted epitaxy method has been demonstrated for producing high quality (000l) hexagonal films on (001) cubic substrates. Highly oriented hexagonal (000l) ZnO films are grown on cubic (001) MgO substrates using Sm 0.28Zr 0.72O 2-δ (SZO) as a template. The large lattice mismatch of >13% between the obvious crystallographic matching directions of the template and substrate means that cube-on-cube epitaxy is energetically unfavorable, leading to growth instead of two high index, low energy compact planes, close to the {111} orientation. These planes give three different in-plane orientations resulting from coincidence site lattice matching (12 in-plane orientations in total) and provide a pseudo-hexagonal symmetry surface for the ZnO to grow on. The texture of the ensuing (000l) ZnO layer is markedly improved over the template. The work opens up both a new avenue for growing technologically important hexagonal structures on a range of readily available, (001) cubic substrates, as well as showing that there are wide possibilities for heteroepitaxial growth of a range of dissimilar materials. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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Details

Item Type: Article
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Kang, BS
Stan, L
Usov, IO
Lee, JKjul37@pitt.eduJUL370000-0002-7778-7679
Harriman, TA
Lucca, DA
Depaula, RF
Arendt, PN
Nastasi, M
MacManus-Driscoll, JL
Park, BH
Jia, Q
Centers: Other Centers, Institutes, Offices, or Units > Petersen Institute of NanoScience and Engineering
Date: 1 December 2011
Date Type: Publication
Journal or Publication Title: Advanced Engineering Materials
Volume: 13
Number: 12
Page Range: 1142 - 1145
DOI or Unique Handle: 10.1002/adem.201100106
Schools and Programs: Swanson School of Engineering > Mechanical Engineering and Materials Science
Refereed: Yes
ISSN: 1438-1656
Date Deposited: 23 Oct 2014 16:09
Last Modified: 22 Jun 2021 13:56
URI: http://d-scholarship.pitt.edu/id/eprint/23400

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