Fyzikální ústav Akademie věd ČR

Semináře

Jahn-Teller phonons inducing ferroelectricity in GaV4S8

Út, 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

Út, 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

Čt, 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

Čt, 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
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Michal Malinský Baryon and lepton number violation in the Standard Model and beyond 29.01.2014 14:00
Egbert Zojer Using Quantum-Mechanical Modelling to Understand the Role of Interfaces in Organic Electronics 28.01.2014 10:00
Tomáš Laštovička Novinky z konference LCWS 2013 aneb aktuality o výstavbě urychlovače ILC v Japonsku 16.01.2014 14:00
Victor M. García-Suárez Thermoelectric properties of molecular junctions 14.01.2014 10:00
J. Kulveit Neklasická nukleační teorie 07.01.2014 13:00
Petr Vopěnka Úplná rehabilitace Newtonova a Leibnizova infinitezimálního počtu 17.12.2013 15:00
Nora Abdellaoui Design of plasmonic rare earth phosphor films by Pulsed Laser Deposition 17.12.2013 10:00
Nora Abdellaoui POZVÁNKA NA PŘEDNÁŠKU 17.12.2013 10:00
Martina Boháčová Metody detekce kosmického záření – fluorescenční a mikrovlnná 12.12.2013 14:00
Ruslan Temirov How much control over single molecules could one get with the junction of a scanning probe microscope? 10.12.2013 10:00
A.J. Weymouth Tabletop AFM, and, an interesting observation when probing forces and currents 03.12.2013 10:00
Dr. Pawel Perkovski & Dr. Wiktor Piecek 1) Relaxation modes close to SmA* - SmCa* phase transitions 2) Optically addressed diffractive structures 03.12.2013 10:00
Peter Markoš Numerical Analysis of Anderson localization 29.11.2013 10:00
Viktor Holubec Theoretical description of non-equilibrium energy transformation processes on the level of molecular structures 26.11.2013 15:00
Jeongsu Lee Nodal ”ground states” and orbital textures in semiconductor quantum dots 26.11.2013 13:00
Prof. Bernard Hehlen Peculiarity of the low frequency dynamics of ferroelectric relaxors 19.11.2013 10:00
Prof. Sean Li Self-assembly of CeO2 Nanocubes: New Approach for the Development of Resistive Random Access Memory Devices 15.11.2013 14:00
E. Mihóková, P. Novák Crystal field and magnetism with Wannier functions: rare-earth ions in garnets, manganites and cobaltates 14.11.2013 14:00
Jiří Chudoba Aktuální trendy ve zpracování dat - zpráva o konferencích CHEP 2013 a HEPIX 14.11.2013 14:00
Tadeusz Domański Superconducting fluctuations in the electron systems with real-space pairs 12.11.2013 15:00
Peter Moulton Ti:sapphire Lasers: Past, Present and Future 06.11.2013 15:00
Istvan Kezsmarki New optical phenomena in multiferroic materials 05.11.2013 15:00
Prof. Shigeki Tokita Development of high-power mid-infrared Er fiber lasers 04.11.2013 14:30
Prof. Junji Kawanaka Current status of TRAM laser and its application at ILE/Osaka 04.11.2013 14:00
Michael Prouza Temná hmota a temná energie v současné kosmologii 31.10.2013 14:00
D.S. Shapiro Dynamic regime of conduction in the Luttinger liquid with an impurity 29.10.2013 15:00
Vít Zajac Charge transport in THz regime: carrier localization vs. effective medium effects 24.10.2013 10:00
Karel Král Energy transfer between nanostructures 22.10.2013 15:00
Jiří Hlinka Soft modes of antiferroelectric lead zirconate 22.10.2013 10:00

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