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Seminars

Vortex ratchet effects in superconducting curved bridge

Tuesday, 10.12.2019 10:00

Bei Yi Zhu (National Lab for Superconductivity, Institute of Physics, Chinese Academy of Sciences, Beijing, China)

Abstract: We study the vortex ratchet effects in superconducting asymmetric curved bridges. By transport measurements, we find that the rectified dc voltages are significantly enhanced, and we obtain clearly asymmetric voltage waveforms versus time in one period. The rectification effect can be achieved in a very wide range of temperatures, currents and magnetic fields. Based on the simulations of time-dependent Ginzburg-Landau equations, we demonstrate that the giant ratchet effects are mainly caused by the collective behavior of vortices in this asymmetric structure, which is quite...

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Wentzel Jamnitzer’s work Perspectiva corporum regularium from 1568 and its relationship to emergence of modern science

Thursday, 12.12.2019 15:00

Jan Fábry (Fyzikální ústav AV ČR, oddělení dielektrik)

Abstract: The discussed Wentzel Jamnitzer’s work belongs to works which have been published most frequently throughout the 15-th and 16-th centuries and which depicted Platonic (regular) bodies. It was believed at that time that these bodies comprised the essence of nature of the surrounding world, which was percepted by external senses, or exclusively accessible by intellect. Complexity of the surrounding world could be symbolized by a geometric combination of the Platonic bodies which gave rise to semiregular or even more complicated bodies.

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Past seminars

prof. Mikhael D. Levi Unique Material Characterizations of Energy Storage and Conversion Electrodes Using Acoustic Spectroscopy by EQCM-D (Electrochemical Quartz Crystal Microbalance with Dissipation Monitoring) 28.11.2019 10:00
Gorm Olle Steffensen Build a Bound State – Coupling Quantum Dots to Superconductors 26.11.2019 10:00
Izabela Jendrzejewska Synthesis, structure and physicochemical properties of spinel compounds doped with selected elements: p-, d- and f- electronics 25.11.2019 14:00
Koen A. de Mare Effective model of antiferromagnetic MnTe 19.11.2019 16:00
Daria Medvedeva Study of influence of non-local interactions on the properties of the systems with strong electron correlations 19.11.2019 15:00
Dr. Oleg Sidletskiy Optical peculiarities in carbon-doped garnets 05.11.2019 13:00
Jiajun Li Dynamics and Hidden Phases in Photo-Excited Mott Insulators 01.11.2019 12:00
Klára Uhlířová The influence of Cu-Mn content on the structural and physical properties of bulk CuMnAs 30.10.2019 15:00
Dr. Jagdheesh Radhakrishnan Water Repellent Surface Structures by Laser Patterning 29.10.2019 14:00
Alireza Kashir Strain Engineering of Lattice Dynamics and Spin-Phonon Interaction in Rocksalt Magnetic Binary Oxides 24.10.2019 10:00

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