Tailoring the Properties of Artificially Layered Ferroelectric Superlattices


  • P.G. thanks N. Pertsev for helpful discussions about Landau theory. This work was supported by the Swiss National Science Foundation through the National Center of Competence in Research Materials with Novel Electronic Properties-MaNEP and Division II, ESF (Thiox), VolkswagenStiftung, the European Network of Excellence FAME, and the European STREP MaCoMuFi.


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The polarization of PbTiO3/SrTiO3superlattices is experimentally tuned from 0–60 μC/cm–2 and the transition temperature from room temperature to 1000 K while maintaining a perfect crystal structure and low leakage currents (see figure). A simple model based on Landau theory is developed as a guide for the straightforward production of samples with ferroelectric properties designed for particular applications.