Hiroki Taniguchi (Department of Physics, Nagoya University, Japan)
Titre : Development of silicate and aluminate based functional materials
Institut Néel, Salle E424 (Salle Louis Weil)
Résumé : Our group focuses on oxide materials primarily composed of abundant elements such as silicon and aluminum, aiming to develop innovative ferroelectric, antiferroelectric, and high-permittivity dielectric materials. In this seminar, I will highlight our recent discoveries with several key materials: ferroelectric Bi2SiO5-type oxides with 1-dimensional SiO4 chains [1–3], improper ferroelectric aluminate-sodalite-type oxides with a zeolitic [AlO2]12 cage structure [4–6], antiferroelectric-like titanite-type oxides with 1-dimensional TiO6 chains [7,8], and wide-bandgap aluminates exhibiting optically tunable dielectric permittivity [9–11].
References: [1] HT et al, Angew. Chem. Int. Ed. 52, 1–6 (2013). [2] HT et al, J. Mater. Chem. C 4, 3168–3174 (2016). [3] HT et al, Phys. Rev. Materials 2, 045603 (2018). [4] HT et al, J. Mater. Chem. C 9, 15649 (2021). [5] T. Wakamatsu and HT et al, Inorg. Chem. 58 15410 (2019). [6] Y. Maeda and HT et al, Phys. Rev. Applied 7, 034012 (2017). [7] HT et al, ACS Nano 18, 14523–14531 (2024). [8] T. Uohashi and HT et al, Appl. Phys. Lett. 124, 182901 (2024). [9] T. Nagai and HT et al, Phys. Rev. B 101, 184114 (2020). [10] T. Nagai and HT et al, Appl. Phys. Lett. 111, 232902 (2017). [11] T. Nagai and HT et al, Appl. Phys. Lett. 110, 172901 (2017).
