Interface-charge-coupled polarization response of Pt-ZnO-BaTiO 3-ZnO-Pt heterostructures: Three-layer model expansion

Venkata M. Voora; Tino Hofmann; Matthias Brandt; Michael Lorenz; Marius Grundmann; Mathias Schubert

doi:10.1557/proc-1110-c06-14

Interface-charge-coupled polarization response of Pt-ZnO-BaTiO ₃-ZnO-Pt heterostructures: Three-layer model expansion

Venkata M. Voora, Tino Hofmann, Matthias Brandt, Michael Lorenz, Marius Grundmann, Mathias Schubert

Electrical & Computer Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We present a three-layer dielectric continuum model to study the electrical polarization properties of metal-oxide semiconductor heterostructures. The heterostructures are composed of c-plane (0001) wurtzite-structure (piezoelectric) ZnO and polycrystalline (111) textured perovskite-structure (ferroelectric) BaTiO₃, which reveal coupling effects between the non-switchable ionic charge of the wurtzite-structure layer and the electrically switchable lattice charge of the perovskite structure layer at their common interfaces. This model expands our previous two-layer model approach [J. Electron. Mater 37, 1029 (2008)]. We calculate and discuss the highly symmetric Sawyer-Tower circuit response. The ferroelectric polarization in the BaTiO ₃ layer gives rise to hysteresis observation. Formation of depletion zones within the ZnO layers produces polarization offsets, which strongly depend on the spontaneous polarization orientation and magnitude within the ZnO layers. Our model is in excellent qualitative agreement with experimental data from a ZnO-BTO-ZnO heterostructure, and we identify the spontaneous polarization orientation in both wurtzite structure ZnO layers by comparison with our model.

Original language	English (US)
Title of host publication	Theory and Applications of Ferroelectric and Multiferroic Materials
Publisher	Materials Research Society
Pages	65-72
Number of pages	8
ISBN (Print)	9781615677580
DOIs	https://doi.org/10.1557/proc-1110-c06-14
State	Published - 2008
Event	2008 MRS Fall Meeting - Boston, MA, United States Duration: Dec 1 2008 → Dec 4 2008

Publication series

Name	Materials Research Society Symposium Proceedings
Volume	1110
ISSN (Print)	0272-9172

Other

Other	2008 MRS Fall Meeting
Country/Territory	United States
City	Boston, MA
Period	12/1/08 → 12/4/08

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1557/proc-1110-c06-14

Cite this

Voora, V. M., Hofmann, T., Brandt, M., Lorenz, M., Grundmann, M., & Schubert, M. (2008). Interface-charge-coupled polarization response of Pt-ZnO-BaTiO ₃-ZnO-Pt heterostructures: Three-layer model expansion. In Theory and Applications of Ferroelectric and Multiferroic Materials (pp. 65-72). (Materials Research Society Symposium Proceedings; Vol. 1110). Materials Research Society. https://doi.org/10.1557/proc-1110-c06-14

Interface-charge-coupled polarization response of Pt-ZnO-BaTiO ₃-ZnO-Pt heterostructures: Three-layer model expansion. / Voora, Venkata M.; Hofmann, Tino; Brandt, Matthias et al.
Theory and Applications of Ferroelectric and Multiferroic Materials. Materials Research Society, 2008. p. 65-72 (Materials Research Society Symposium Proceedings; Vol. 1110).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Voora, VM, Hofmann, T, Brandt, M, Lorenz, M, Grundmann, M & Schubert, M 2008, Interface-charge-coupled polarization response of Pt-ZnO-BaTiO ₃-ZnO-Pt heterostructures: Three-layer model expansion. in Theory and Applications of Ferroelectric and Multiferroic Materials. Materials Research Society Symposium Proceedings, vol. 1110, Materials Research Society, pp. 65-72, 2008 MRS Fall Meeting, Boston, MA, United States, 12/1/08. https://doi.org/10.1557/proc-1110-c06-14

Voora VM, Hofmann T, Brandt M, Lorenz M, Grundmann M, Schubert M. Interface-charge-coupled polarization response of Pt-ZnO-BaTiO ₃-ZnO-Pt heterostructures: Three-layer model expansion. In Theory and Applications of Ferroelectric and Multiferroic Materials. Materials Research Society. 2008. p. 65-72. (Materials Research Society Symposium Proceedings). doi: 10.1557/proc-1110-c06-14

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