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.

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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].

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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.

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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.

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Minulé semináře
Roland Winkler Effective Hamiltonian for edge states in graphene 02.06.2016 10:00
Roberto Lorenzi Luminescence and photonics in silica based nanomaterials 01.06.2016 13:00
Teresa Isabel Madeira Application of Photothermal Expansion for Optical Absorption Mapping of Nanostructured Semiconductor Materials 27.05.2016 10:00
Dietrich RT Zahn Spectroscopic Characterisation of Organic Thin Film Deposition and Modification 26.05.2016 15:00
Ing. Tomáš Jakoubek Lifetime, mixing and CP violation measurements in ATLAS 26.05.2016 14:00
Dr. Dennis R. Schaart FAst timing for Positron Emission Tomography 25.05.2016 13:00
Helena Reichlová Magnetization switching by spin–orbit torque in an antiferromagnet–ferromagnet bilayer system 25.05.2016 11:30
Sabine Körbel Computational materials design for photovoltaics and piezoelectrics 24.05.2016 10:00
Petr Kužel Ultrafast Terahertz spectroscopy: a tool for contactless investigation of photoconductivity in nano-scaled systems 24.05.2016 10:00
Harald Brune Realizing the Smallest Surface Adsorbed Quantum Magnets 19.05.2016 15:00
Warren E. Pickett Spin-Orbit Coupling, Strong Interactions, and Topological Character: By Design & By Serendipity 17.05.2016 15:00
E.O. Smetanina Laser-induced correlative SHG and fluorescence in a silver-containing phosphate glass under a train of femtosecond laser pulses 11.05.2016 15:00
Nákup nákladných přístrojů pro r. 2017 - 2. část 10.05.2016 15:00
G. Schull Optoelectronic properties of single-molecule junctions 10.05.2016 10:00
Robert A. Evarestov Electron and Phonon Properties of Perfect and Defective SrTiO3 Crystal 09.05.2016 13:00
Dr. Marcela Mikeštíková Studium radiační odolnosti stripových senzorů pro ATLAS Upgrade 05.05.2016 14:00
Nákup nákladných přístrojů pro r. 2017 04.05.2016 09:00
N.M. Bulgakova, I. Mirza Propagation of powerful laser pulses in atmosphere: general effects of air presence and impact on laser processing of materials 03.05.2016 15:00
Sabine Maier On-surface polymerization and self-assembly of molecular nanostructures: From metal to insulator surfaces 03.05.2016 10:00
Dr. Otokar Dragoun Searching for active and sterile neutrinos in beta-ray spectra 28.04.2016 14:00
Dr. Alberto Iorio Black holes in a pencil case 21.04.2016 14:00
L. H. Tjeng Spin-spin correlations, spin-orbit/Hund’s coupling, and metal-insulator transition in Ca2RuO4 20.04.2016 15:00
Prof. Christophe Dujardin Nanoluminiscence, nanoscintilátory 19.04.2016 13:00
Milan Vrabel Bioorthogonal Chemistry – Organic Chemistry on Biomolecules 19.04.2016 10:00
Peter Pikna; Hynek Němec Ultrafast processes in nanostructured and polycrystalline silicon solar cells; Conductivity mechanisms in doped SnO2 nanoparticles 19.04.2016 10:00
Gang Li Transition metal oxides topological Dirac semimetals 12.04.2016 14:00
Shohei Miyakozawa Temperature dependence of in-plane magnetic anisotropy and anisotropic magnetoresistance in (Ga,Mn)As codoped with Li 12.04.2016 10:00
Grit Köppel Nanostructures for crystalline silicon thin-film solar cells 05.04.2016 10:00
Prof. Benno Willke Observation of Gravitational Waves from a Binary Black Hole Merger 29.03.2016 16:30
Lukáš Šedivý Positron annihilation spectroscopy of defects in CdTe 23.03.2016 13:00

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