Interaction of superconductivity and ferroelectricity by means of the Josephson effect / Interaction of a nanomagnet with a weak superconducting link
Seminars
Seminar “Theory of Condensed Matter”
Date and Time: Tuesday, 5 March 2019, at 4:00 PM
Venue: Blokhintsev Hall (4th floor), Bogoliubov Laboratory of Theoretical Physics
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Seminar Topic: “Interaction of superconductivity and ferroelectricity by means of the Josephson effect”
Authors: I.R. Rachmonov, Yu.M. Shukrinov, N.M. Schelkachev
Speaker: I.R. Rahmonov
Abstract:
Диманика джозефсоновского перехода с ферроэлектрическим барьером описана в рамках RCSJ-модели, а для описания ферроэлектрика использовна теория Ландау-Девоншира. Показано, что в результате взаимодействия между джозефсоновскими осциляциями и осциляциями вектора поляризации в ферроэлектрике, на вольт-амперной характеристике возникает резонансная ветвь. Исследовано влияние параметров модели и нелинейных членов теории Ландау-Девоншира на данную резонансную ветвь.
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Seminar Topic: “Interaction of a nanomagnet with a weak superconducting link”
Authors: M. Nashaat, K. Kulikov, I. Rahmonov, Yu. Shukrinov
Speaker: M. Nashaat
Abstract:
Dynamical equations which discribe the coupling between the Josephson current and the magnetic moment of the nanomagnet are presented in the frame of the voltage and current biased Josephson junctions. We demonstrate the manifestation of ferromagnetic resonance in the maximem aplitude of the magnetic moment components in both frames. In addition to this, a reorientation of easy axis occurs by changing the model parameters. The effect of extremal radiation on the reorientation point is demonstrated.