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
Johannes V. Barth Nanochemistry at surfaces: From single molecules to complex ensembles and dynamics 09.12.2014 10:00
Prof. Ken-ichi Ueda Paradigm Shifts in High Power Laser Technology 09.12.2014 09:30
Prof. Marc Henneaux Three-dimensional gravity: a superb theoretical laboratory 03.12.2014 14:00
Jan Zemen Ab initio study of piezomagnetic effect in Mn-antiperovskites 01.12.2014 10:00
Dr. Marzena Tykarska Miscibility studies of liquid crystals and non-additive behaviour 20.11.2014 10:00
Martin Setvin Excess Electrons in TiO2 Anatase and Rutile: Delocalized Solutions and Localized Small Polarons 18.11.2014 10:00
Christian Teichert Growth of small organic molecules on graphene 14.11.2014 14:00
M. Chrunik New Oxide Materials for Nonlinear Optical Applications 11.11.2014 10:00
Prof. Alberto Morgante Charge transfer processes in organic nano- and hetero-structures 10.11.2014 15:00
Miroslav Havránek Sensors and electronics for the upgrade of pixel detector in the experiment ATLAS 30.10.2014 14:00
Dr. Andreas Undisz Oxide layers on biomedical NiTi alloy – formation mechanism, mechanical stability and consequences for short- and long-term Ni-release 30.10.2014 14:00
Artem Ryabov Diffusion of a tagged particle in open single-file systems 21.10.2014 15:00
Miloš V. Lokajíček Elastic scattering of protons and validity of the optical theorem in strong interactions 16.10.2014 14:00
Jiří Chýla How quarks were discovered 15.10.2014 15:00
Harald Oberhofer A theoretical description of water splitting on metal decorated oxide surfaces 14.10.2014 10:00
Richard Lednický Joint Institute for Nuclear Research in Dubna: past, presence and future 13.10.2014 14:00
Yasuo Koide Diamond Field Effect Transistors with high-k gate insulator 09.10.2014 10:00
Nikolaj Moll Molecular Geometry Determination by Atomic Force Microscopy 07.10.2014 10:00
Petr Ondrejkovič Dynamics of nanoscale polarization fluctuations in a SBN-61 single crystal 07.10.2014 10:00
Sebastian Loth Controlling magnetism in atomically engineered nanostructures 02.10.2014 10:00
Jörn Bonse Femtosecond laser-induced periodic surface structures 19.09.2014 15:00
Thomas Frederiksen Simulations of electron transport phenomena in single-molecule junctions 16.09.2014 10:00
Prof. Alok Singh Nucleation and growth of twins during fracture of a fine grained magnesium alloy 15.09.2014 10:00
E. Z. Kurmaev X-ray spectra and electronic structure of Fe and Cu superconducting pnictides 11.09.2014 14:00
Prof. Jordi Arbiol Exploring the optical properties of nanomaterials at sub-nanometer scale with a direct correlation to its structure at atomic scale 11.09.2014 11:00
Jiří J. Mareš The Concept of Temperature - Critical Analysis 10.09.2014 14:00
Ron Jansen Silicon spintronics 08.09.2014 10:00
Martin Veis Magneto-optical spectroscopy and ellipsometry of nanostructures 28.07.2014 10:00
M. I. Tsindlekht DC and AC Magnetic Properties of the Thin Walled Superconducting Niobium Cylinder 24.07.2014 14:00
Prof. Jeffrey McCord Magnetic materials as seen by magneto-optics 21.07.2014 10:00

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