Fyzikální ústav Akademie věd ČR

Seminars

Jahn-Teller phonons inducing ferroelectricity in GaV4S8

Tuesday, 14.06.2016 10:30 - 11:30

Jiri Hlinka (Department of Dielectrics )

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

Tuesday, 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

Thursday, 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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Optical convertors for high average-power, high-repetition laser

Tuesday, 28.06.2016 15:00

H. Turčičová, O. Novák (Dolní Břežany)

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Past seminars
Petr Vopěnka Full rehabilitation of the calculus infinitesimalis by Newton and Leibniz 17.12.2013 15:00
Nora Abdellaoui Design of plasmonic rare earth phosphor films by Pulsed Laser Deposition 17.12.2013 10:00
Martina Boháčová Cosmic rays detection methods - fluorescence and microwave 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 Current trends in data processing - CHEP 2013 and HEPIX conferences report 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 Dark matter and dark energy in contemporary cosmology 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
Jan Fischer Calculation of the coupling parameter α_s from hadronic decay of the τ lepton 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

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