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
Bedřich Velický On The Weak Quantum Mechanical Measurements 05.06.2012 15:00
Jiří Pokorný Electrodynamic activity of cells and its changes during the malign process 05.06.2012 10:00
Miroslav Myška Study of multiple parton collisions in ATLAS experiment 01.06.2012 13:30
Vít Novák Antiferromagnetic semiconductors I-Mn-V: epitaxial growth and first experiments 30.05.2012 15:00
Jindřich Kolorenč Anderson impurity model in an external magnetic field 29.05.2012 15:00
František Máca The electronic and magnetic structure of Mn doped semiconductors and semimetals 22.05.2012 15:00
Gustau Catalan "Flexoelectricity: What is it, and why does it matter" 18.05.2012 10:00
Victor V. Kukhtin JINR participation in ATLAS upgrade 17.05.2012 15:00
Wilfried Schranz Dynamic elasticity of materials 15.05.2012 15:00
Prof. Hamid Oughaddou Growth of Silicene 14.05.2012 15:00
Ing. Štěpán Stehlík, Ph.D. Electrical potentials of nanodiamonds with different surface terminations evaluated by Kelvin probe force microscopy 09.05.2012 09:30
Carlito S. Ponseca Charge carrier dynamics in polymer solar cell materials probed by time resolved terahertz spectroscopy 03.05.2012 10:00
Oldřich Kepka, Martin Zeman Measurement of WW production cross section in the ATLAS experiment 27.04.2012 13:30
Irinel Caprini Novel perturbation expansions in QCD and applications: a conformal mapping approach 26.04.2012 15:00
Falak Sher Synthesis and Properties of La/BiMnO3 Multiferroics 26.04.2012 10:00
Vladislav Pokorný Vertex corrections to the electrical conductivity of the disordered Falicov-Kimball model 24.04.2012 15:00
Amadeo L. Vázquez de Parga Graphene on Ru(0001): A nanostructured surface 24.04.2012 10:00
Prof. Dr. Beata Ziaja-Motyka Computer simulations of FEL-excited matter 23.04.2012 13:00
Serge Nakhmanson Ab initio design of multifunctional materials with advanced properties: Goldstone-like states in a layered perovskite with constrained polarization 17.04.2012 10:00
Seminar on Scanning Microwave Microscopy 17.04.2012 10:00
Roland Winkler Emergent Electromagnetism in Bilayer Graphene 16.04.2012 11:00
Jakub Cúth The method of unfolding in the analysis of chrage assymetry of top quark pairs 13.04.2012 14:10
Roman Lysák Charge asymmetry in top quark pair production in the ATLAS experiment 13.04.2012 13:30
ELI-Miniworkshop on Biological Imaging with Intense Ultra-Short x-Ray Pulses 13.04.2012 09:30
Prof. A.P. Levanyuk Ferroelectric phase transitions in thin films, ferroelectric-paraelectric superstructures and small particles: effects of the depolarizing field 11.04.2012 15:00
Dr. Jérôme Gaudin The European XFEL in Hamburg: current status 11.04.2012 13:30
Y.O. Kvashnin Ab initio study of 3d systems under high pressure 10.04.2012 15:00
Prof. Andrzej Maziewski Spin Ordering and Magnetization Processes in Nanostructures: from Ultrathin Films to Multilayers 30.03.2012 10:00
B. Reischl Simulating atomic force microscopy of calcite in water 29.03.2012 16:00
Dr. Konstantin Zhuravlev Exciton formation, transfer and recombination in semiconductor layers and quantum dot 28.03.2012 13:00

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