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
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
Jan Fischer Výpočet vazbového parametru α_s z hadronového rozpadu leptonu τ 17.10.2013 14:00
Neha Topnani and Anna Zep Selected results from our partners in liquid crystal research 17.10.2013 10:00
Peter West Symmetries and their role in fundamental physics 15.10.2013 15:00
Mateusz Mrukiewicz Dual-frequency nematic liquid crystals 15.10.2013 10:00
Jiří Kvita Differential spectra for t-tbar events in the ATLAS experiment 10.10.2013 14:00
Jan Kuneš Off-diagonal order in materials close to spin-state transition 08.10.2013 15:00
Héctor Vázquez Electron transport in molecular systems 08.10.2013 10:00
Martin Schnabl Stringy and higher-spin activities in the theory department 03.10.2013 14:00
Vladislav Pokorný Spectral and transport properties of a superconducting quantum dot system 01.10.2013 15:00
Prof. Makoto Konagai Research and Development of Innovative Solar Cells – Establishing Global Research Centers 27.09.2013 10:00
Vladislav Pokorný Spectral and transport properties of a superconducting quantum dot system 26.09.2013 14:00
Isodiana Crupi Plasmonic metal nanoparticles for thin film solar cells 24.09.2013 10:00
Alexander Kupčo Novinky z konference EPS 2013 19.09.2013 14:00
Cedric Rocha Leao Ab-initio investigation of the degradation process in TlBr: causes and possible fixes 18.09.2013 15:00
Pavel Novák Calculation of crystal field parameters with Wannier functions 12.09.2013 14:00
Christophe Ballif Thin film silicon layers: from low cost thin film solar modules to high efficiency crystalline heterojunction cells 11.09.2013 10:00
Jose Repond Imaging Calorimetry for Lepton Colliders 05.09.2013 14:00

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