Fyzikální ústav Akademie věd ČR

Semináře

Jahn-Teller phonons inducing ferroelectricity in GaV4S8

Úterý, 14.06.2016 10:30 - 11:30

Jiri Hlinka (Oddělení dielektrik )

Interesting ferromagnetic ferroelectric system permitting skyrmionic spin structure phases has also a peculiar ferroelectric transition. We shall briefly report about theoretical and experimental studies of the lattice-dynamics aspects of this phase transition.

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High-pressure behaviour of transition metal dichalcogenides MoS2, MoSe2 and MoTe2 from ab initio simulations

Úterý, 14.06.2016 15:00 - 16:00

Roman Martoňák (Department of Experimental Physics, Comenius University in Bratislava, Mlynská dolina F2, 842 48 Bratislava, Slovakia)

Abstract: We study the evolution of structural and electronic properties of layered semiconducting transition metal dichalcogenides, MoX2 (X = S, Se, Te) upon increasing pressure, employing ab initio DFT calculations in combination with metadynamics and evolutionary search. We found that in MoS2 a layer sliding structural transition occurs at 20 GPa, converting the 2Hc stacking stable at ambient pressure to the 2Ha stacking (known in 2H-NbSe2)[1].

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Optical trapping of silica nanoparticles in air

Čtvrtek, 16.06.2016 10:00 - 11:00

Lukáš Ondič (Fyzikální ústav AV ČR, v.v.i.; Cikrovarnická 10; Praha 6)

Tightly focused electromagnetic radiation (an optical beam) can be used to capture a small particle without physically touching it. This technique, which has led to a Nobel prize in physics and a whole new industry in biotechnology, could allow for example to explore new physical regimes when it is combined with cooling the particle to its quantum ground state.

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Spin Seebeck effect in Fe3O4 heterostructures

Čtvrtek, 16.06.2016 14:00

Alberto Anadon (Universidad de Zaragoza, Spain)

The interaction between heat and spin currents has been a very active field of study and highly boosted recently since the discovery of the spin Seebeck effect (SSE). The mechanism and control of spin injection, detection and, in general, the optimization of SSE signal is still in progress.

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Minulé semináře
Iván Brihuega Visualizing and manipulating graphene physics at the atomic scale 21.05.2015 15:00
R. Cimrman, M. Novák, and J. Vackář Isogeometric analysis, environment-reflecting separable pseudopotentials and Hamiltonian rank-m updates in the evaluation of Hellman-Feynman forces 12.05.2015 15:00
Miroslav Kotrla Multiscale modeling of magnetic metals heteroepitaxial overlayers. 05.05.2015 15:00
Dr. Xavier Martí From/to science to/from business 30.04.2015 10:00
Matthias Vojta Coupled-dimer magnets: Systematic expansions, quantum criticality, and disorder 28.04.2015 15:00
Bert Voigtländer Charge Transport Measurements at the Nanoscale using a Multi-Tip STM 28.04.2015 10:00
Prof. David A. Crandles The Search for Ferromagnetism in SrTiO3 28.04.2015 10:00
Prof. Shih-Jye Sun The property variations of ZnO responding to UV irradiations 27.04.2015 13:30
Prof. Hua Shu Hsu Introduction to Magnetic Circular Dichroism and its application in magnetic semiconductor 27.04.2015 13:00
Vladislav Šimák Dvacet let od objevu top kvarku 23.04.2015 14:00
Jiří Chaloupka Magnetism of layered honeycomb iridates 21.04.2015 15:00
Alexander Poddubny Surface engineering in silicon- and germanium- based nanocrystals 21.04.2015 10:00
Hendrik Vita Interaction of magnetic and non-magnetic metals with graphene 14.04.2015 15:00
Roman Fasel Electronic and optical properties of atomically precise graphene nanoribbons 09.04.2015 15:00
Holger Kersten Non-conventional diagnostics for process plasmas 08.04.2015 15:00
Jan Skolimowski Anderson and Mott transitions in presence of the spin-dependent disorder 07.04.2015 15:00
Prof. David Crandles Infrared spectroscopy of dilute magnetic semiconductors 02.04.2015 10:00
Karel Jurek a hosté 9. pracovní schůzka skupiny lokální rtg. mikroanalýzy 26.03.2015 10:00
Prof. Gerard Mourou Extreme Light: Bridging Optics and Fundamental High Energy Physics - The first steps towards Zeptosecond and Zettawatt Science 25.03.2015 17:00
Vladislav Pokorný Perturbation theory of a zero-pi transition in a superconducting quantum dot system 24.03.2015 15:00
Tomáš Polívka Carotenoid photophysics Rich excited-state properties of seemingly simple molecules 24.03.2015 10:00
Jiří Mareš K- and eta mesons in atomic nuclei 19.03.2015 14:00
Styliani Skiadopoulou Spin and lattice excitations of a BiFeO3 thin film and ceramics 17.03.2015 10:00
Pavel Středa Scattering matrix approach to the anomalous Hall effect 11.03.2015 10:00
Veronica Goian Ferroelectricity and spin-phonon coupling in multiferroic Sr1-xBaxMnO3 03.03.2015 10:00
Dr. Deepak Kar All about partonic showers 19.02.2015 14:00
Přednáškový den na ÚPT AV ČR v Brně 18.02.2015 09:00
Jiří Červenka DNA detection using graphene and diamond 17.02.2015 10:00
Pablo Merino Single photon emission in STM-induced luminescence from fullerene excitons 10.02.2015 10:00
Karel Závěta Historie magnetickeho výzkumu v Čechách (Československu) očima svědka z Cukrovarnické 05.02.2015 14:00

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