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Information × Registration Number 0225U001880, (0122U000808) , R & D reports Title New physical phenomena in multiferroics on the base of oxides and chalcogenides for modern nanoelectronics and spintronics popup.stage_title Нові фізичні явища в мультифероїках на основі оксидів та халькогенідів для сучасної наноелектроніки та спінтроніки Head Hlynchuk Maiia D., д.ф.-м.н. Registration Date 10-02-2025 Organization Frantsevich Institute for Problems of Materials Science National Academy of Science of Ukraine popup.description1 Study of physical laws of reversal of order parameters (ferro-, antiferro-, ferrotoroidal, electrical polarization) under the influence of external fields at the normal, low and ultra-low temperatures. popup.description2  The polar properties of thin strained films of multiaxial ferroelectrics were investigated, taking into account the shielding by surface ions. The phase diagrams were calculated depending on the temperature, film thickness, partial pressure of oxygen and mismatch deformations. The mechanisms that can lead to stationary or transient negative capacitance in the ensemble of ferroelectric nanoparticles covered with a layer of ions and electrons, and in ferroelectric films stabilized by a dielectric layer, were investigated. Analytical expressions were obtained and numerical calculations were performed for the electric polarization and capacitance using the example of a field-effect transistor heterostructure. The attosecond dynamics of electron transmission through atomically thin crystalline films was investigated. The photoelectron escape time from the W(110) surface was calculated in a wide energy range. It is established for the first time that the Wigner time delay diverges in scattering resonances caused by the appearance of secondary diffracted beams. Product Description popup.authors Yurchenko Lesia P Lahuta Valentyn V. Zahorodnii Yurii О. Rohinets Nadiia V. Likhtin Andrіy E Kondakova Iryna V Hlynchuk Maiia D. Yelisieiev Yevhen A. Kuzian Roman O. popup.nrat_date 2025-02-10 Close