Relaxor-like features in pressure-treated barium titanate powder

Pugachev, A. M.; Kovalevsky, V. I.; Malinovsky, V. K.; Borzdov, Yuri M.; Суровцев, Н. В.

doi:10.1063/1.4930824

Cited by 9 publications

(1 citation statement)

References 39 publications

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“…By detecting the optical signals, SHG can be used to study the symmetry of non-centrosymmetric structures, [87] which manifest the removal of an inversion center due to the macroscopic discontinuities or microscopic symmetry breaking, [88][89][90] such as the sample surface, [83,91,92] the interfaces within heterostructures and superlattices, [93][94][95][96] and the intrinsic ferroelectrics. [97,98] In past decades, extensive attention has been paid to the symmetry determinations of surface and interfaces in perovskite oxide films using SHG where the SH polarimetry directly reflects the symmetry, and its intensity dominates the strength of the polarization within those structures. It has also been successfully applied to determine the polar state, domain distribution, and interactions among individual domains within many functional oxide films.…”

Section: Optical Second Harmonic Generationmentioning

confidence: 99%

Photon-interactions with perovskite oxides

et al. 2022

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Photons with variable energy, high coherency, and switchable polarization provide an ideal tool-kits for exploring the cutting-edge scientific questions in the condensed matter physics and materials sciences. Over decades, extensive researches in the sample fabrication and excitations have employed the photon as one of the important means to synthesize and explore the low-dimensional quantum materials. In this review, we firstly summarize the recent progresses of the state-of-the-art thin-film deposition methods using excimer pulsed laser, by which syntactic oxides with atomic-unit-cell-thick layers and extremely high crystalline quality can be programmatically fabricated. We demonstrate the artificially engineered oxide quantum heterostructures exhibit the unexpected physical properties which are absence in their parent forms. Secondly, we highlight the recent work on probing the symmetry breaking at the surface/interface and weak couplings among nanoscale ferroelectric domains using optical second harmonic generation. We clarify the current challenges in the in-situ characterizations under the external fields and large-scale imaging using optical second harmonic generation. The improvements in the sample quality and the non-contact detection technique further promote the understanding of the mechanism of the novel properties emerged at the interface and inspire the potential applications, such as the ferroelectric resistive memory and ultrahigh energy storage capacitors.

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