Determining interface structures in vertically aligned nanocomposite films

Authors: Bonan Zhu1*, Georg Schusteritsch2, Ping Lu3, Judith L. MacManus-Driscoll1, Chris J. Pickard2

  1. Department of Materials Science and Metallurgy, University of Cambridge
  2. Department of Materials Science and Metallurgy, University of Cambridge & Advanced Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba, Sendai, 980-8577, Japan
  3. Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
  • Corresponding author email: bz240@cam.ac.uk

DOI10.24435/materialscloud:2019.0025/v1 (version v1, submitted on 31 May 2019)

How to cite this entry

Bonan Zhu, Georg Schusteritsch, Ping Lu, Judith L. MacManus-Driscoll, Chris J. Pickard, Determining interface structures in vertically aligned nanocomposite films, Materials Cloud Archive (2019), doi: 10.24435/materialscloud:2019.0025/v1.

Description

Vertically aligned nanocomposites (VANs) films have self-assembled pillar-matrix nanostructures. Owing to their large area-to-volume ratios, interfaces in VAN films are expected to play key roles in inducing functional properties, but our understanding is hindered by limited knowledge about their structures. Motivated by the lack of definitive explanation for the experimentally-found enhanced ionic conductivity in Sm-doped-CeO2/SrTiO3 VAN films, we determine the structure at vertical interfaces using random structure searching and explore how it can affect ionic conduction. This record contains the candidate structures and provenance of the DFT validation calculations. Previously unknown interface structures are found, with lower energy than that of an optimized hand-built model. We find a strongly distorted oxygen sub-lattice which gives a complex landscape of vacancy energies. The cation lattice remains similar to the bulk phase but has a localized strain field. The excess energy of the interface is similar to that of high angle grain boundaries in SrTiO3.

Materials Cloud sections using this data

Files

File name Size Description
interface.aiida
MD5MD5: 12a68a1e8c124a58eb5e8f89dd81a66a
114.8 MiB The provenance of the CASTEP DFT calculations mentioned in the paper.
AiiDA Version: 0.12.3
rss-relaxed-structures.tar.gz
MD5MD5: e0740d4b675c7a7ef34d0205ffc00537
112.9 MiB Relaxed random structures from which the low energy interface configurations are discovered.
README.txt
MD5MD5: 397228bfbe8b18be2465a662dd762c6c
1.3 KiB Readme file for the random structures

License

Files and data are licensed under the terms of the following license: Creative Commons Attribution 4.0 International.

External references

Journal reference (Paper in which the data is discussed)
B. Zhu, G. Schusteritsch, P. Lu, JL. MacManus-Driscoll, CJ. Pickard, APL Materials 7, 061105 (2019) doi:10.1063/1.5099204

Keywords

density functional theory structure prediction solid-solid interface

Version history

31 May 2019 [This version]