论文信息 - Polarization coupling in epitaxial ZnO / BaTiO3 thin film heterostructures on SrTiO3 (100) substrates

Polarization coupling in epitaxial ZnO / BaTiO3 thin film heterostructures on SrTiO3 (100) substrates

Strong polarization coupling is expected by combining ferroelectric materials with switchable polarization and wurtzite layers exhibiting a permanent spontaneous polarization. To demonstrate these charge coupling effects, current-voltage, conductivity-frequency and capacitance-frequency (admittance) characteristics have been measured on epitaxial heterostructures grown of ferroelectric BaTiO3 (001) films on conducting SrRuO3 layers on SrTiO3 (100) substrates with oxide SrRuOx, metallic Pt and semiconducting ZnO top electrodes. The electrical measurements show clear indications for polarization coupling of the ferroelectric perovskite BaTiO3 and the piezoelectric wurtzite ZnO thin films.

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