Engineered interfaces of artificial perovskite oxide superlattices via nanosheet deposition process

Bao Wen Li, Minoru Osada, Tadashi C. Ozawa, Yasuo Ebina, Kosho Akatsuka, Renzhi Ma, Hiroshi Funakubo, Takayoshi Sasaki

Research output: Contribution to journalArticle

99 Citations (Scopus)

Abstract

Combining different materials into desired superlattice structures can produce new electronic states at the interface and the opportunity to create artificial materials with novel properties. Here we introduce a new, rather unexpected, and yet simple way to such a superlattice assembly of perovskite oxides: in the Dion-Jacobson phase, a model system of layered perovskites, high-quality bicolor perovskite superlattices (LaNb2O 7)nL(Ca2Nb3O10) nC are successfully fabricated by a layer-by-layer assembly using two different perovskite nanosheets (LaNb2O7 and Ca 2Nb3O10) as a building block. The artificially fabricated (LaNb2O7/Ca2Nb3O 10) superlattices are structurally unique, which is not feasible to create in the bulk form. By such an artificial structuring, we found that (LaNb2O7/Ca2Nb3O10) superlattices possess a new form of interface coupling, which gives rise to ferroelectricity.

Original languageEnglish
Pages (from-to)6673-6680
Number of pages8
JournalACS Nano
Volume4
Issue number11
DOIs
Publication statusPublished - 2010 Nov 23
Externally publishedYes

Keywords

  • Artificial superlattice
  • Ferroelectricity
  • Layer-by-layer assembly
  • Perovskite nanosheets

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

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  • Cite this

    Li, B. W., Osada, M., Ozawa, T. C., Ebina, Y., Akatsuka, K., Ma, R., Funakubo, H., & Sasaki, T. (2010). Engineered interfaces of artificial perovskite oxide superlattices via nanosheet deposition process. ACS Nano, 4(11), 6673-6680. https://doi.org/10.1021/nn102144s