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
Antonio Lucianetti Nonlinear thermal effects and Amplified Spontaneous Emission (ASE) in high-average-power solid-state lasers 27.10.2010 14:30
Vladimír Železný Topological insulators 26.10.2010 10:00
Pavel Růžička Měření měkké difrakce pomocí kalorimetru detektoru ATLAS 22.10.2010 13:30
Prof. Akira Endo High average power, short pulse solid state lasers for compact X-ray sources via Compton scattering and plasma emission 21.10.2010 15:00
Dr. Joerg Wunderlich Colloquium Cukrovarnická - Spin Hall effect transistor 21.10.2010 15:00
Iegor Rafalovskyi Irradiation influence on charge carrier transport in AlGaN/GaN heterostructure 21.10.2010 10:00
Jan Kuneš Počítačové modelovaní elektronových korelací v pevných látkách 20.10.2010 15:00
Andrea Campoleoni Asymptotic symmetries of 3D gravity coupled to higher-spin fields 11.10.2010 15:00
Dr. Marina Tjunina Epitaxial control of polar order in perovskites 08.10.2010 13:00
Andrea Taroni Atomistic Spin Dynamics of Low-dimensional Magnets 06.10.2010 15:00
Stéphane Sebban Progress on laser driven x-ray sources at the Laboratoire d’Optique Appliquée 06.10.2010 09:30
Dr. Pedro de Andres Physical chemistry on graphene 05.10.2010 10:00
David Šálek Měření difrakční longitudinální strukturní funkce protonu v experimentu H1 01.10.2010 13:30
Pavel Marton Atomic origin of ferroelectric hardening in PbTiO3 and Pb(ZrTi)O3 24.09.2010 16:00
Taneli Laamanen Electronic Structure of Rare Earth Ions in the Sr2MgSi2O7 Persistent Luminescence Host Material 24.09.2010 14:00
Kateřina Kůsová Vliv organické pasivace na optické vlastnosti křemíkových nanokrystalů 23.09.2010 13:00
Igor Beinik Electrical characterization of semiconductor nanostructures by scanning probe microscopy based techniques 21.09.2010 14:00
Petr Němec MLD in (Ga,Mn)As 15.09.2010 15:00
Dr. Daisuke Takeuchi Single Crystal Diamond Electronic Devices 10.09.2010 14:00
Tomáš Ostatnický Spontaneous coherence in systems of cavity polaritons 07.09.2010 10:00
Ashoke Sen Extremal black hole entropy 30.08.2010 15:00
Julien Pernot Mobility in homoepitaxial doped diamond 20.07.2010 13:00
Kiyoka Okada First direct confirmation of nano-nucleation and new nucleation theory 19.07.2010 14:00
prof. Masamichi Hikosaka New polymer crystallization mechanism and realization of the ultra high performances 19.07.2010 10:00
Darrell G. Schlom A thin film approach to engineering functionality into oxides 30.06.2010 15:00
Karsten Held Dynamical vertex approximation - a step beyond dynamical mean field theory 29.06.2010 15:00
Dieter Lüst Strings at LHC 24.06.2010 15:00
Ansgar Liebsch Correlation induced spin freezing transition in FeSe and FeAsLaO: a dynamical mean field study 24.06.2010 14:00
Dr. Victor Sokolov Optical evidence of strong d-p coupling in Zn1-xMnxO 23.06.2010 13:00
Miloš Lokajíček ml. Program Fermilab a spolupráce s ČR 21.06.2010 15:00

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