Depolarizing-Field Effects in Epitaxial Capacitor Heterostructures
| Autor: | Nives Strkalj, Manfred Fiebig, Morgan Trassin, G. De Luca, Shovon Pal, Nicola A. Spaldin, Jakob Schaab, Marta D. Rossell, Marco Campanini, Chiara Gattinoni |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Field (physics) Condensed matter physics General Physics and Astronomy Second-harmonic generation Heterojunction Conductivity Epitaxy 01 natural sciences Ferroelectricity 3. Good health law.invention Condensed Matter::Materials Science Capacitor law 0103 physical sciences 010306 general physics Polarization (electrochemistry) |
| Zdroj: | Physical Review Letters Physical Review Letters, 123 (14) |
| ISSN: | 1079-7114 |
| Popis: | We identify a transient enhancement of the depolarizing field, leading to an unexpected quench of net polarization, during the growth of a prototypical metal-ferroelectric-metal epitaxial system made of ${\mathrm{BaTiO}}_{3}$ and ${\mathrm{SrRuO}}_{3}$. Reduced conductivity and, hence, charge screening efficiency in the early growth stage of the ${\mathrm{SrRuO}}_{3}$ top electrode promotes a breakdown of ferroelectric ${\mathrm{BaTiO}}_{3}$ into domains. We demonstrate how a thermal annealing procedure can recover the single-domain state. By tracking the polarization state in situ, using optical second harmonic generation, we bring new understanding to interface-related electrostatic effects in ferroelectric capacitors. |
| Databáze: | OpenAIRE |
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