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.

Více >>

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].

Více >>

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.

Více >>

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.

Více >>

Minulé semináře
A. P. Kamantsev Direct Measurements of Magnetocaloric Properties of Magnetics in Bitter Magnet: New Techniques & Materials 08.01.2015 14:30
Peter Mohn Research at the Center for Computational Materials Science (CMS) 16.12.2014 15:00
Peter Liljeroth Low-temperature STM on molecules and atomically well-defined graphene structures 16.12.2014 10:00
Prof. Cristian FOCSA Laser Ablation Fundamentals and Applications 15.12.2014 15:00
Prof. Jan P. F. Lagerwall and Dr. Giusy Scalia Playing with liquid crystal bubbles and Molecular wires from discotic liquid crystals 15.12.2014 10:30
Alice Hospodková Příběh modré emisní diody 10.12.2014 15:00
Prof. Sebastiaan van Dijken Electric-Field Control of Magnetic Domain Wall Motion in Ferromagnetic-Ferroelectric Heterostructures 09.12.2014 13:00
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 Senzory a elektronika pro upgrade pixelového detektoru v experimentu 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 Elastický rozptyl protonů a platnost optického teorému v silných interakcích 16.10.2014 14:00
Jiří Chýla Jak byly objeveny kvarky 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

Copyright © 2008-2014, Fyzikální ústav AV ČR, v. v. i.