Fyzikální ústav Akademie věd ČR

Semináře

Jahn-Teller phonons inducing ferroelectricity in GaV4S8

Úterý, 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

Úterý, 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

Čtvrtek, 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

Čtvrtek, 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
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
Jan Benedikt Cold atmospheric plasmas for material synthesis and surface treatment 23.03.2016 10:00
Luca M. Ghiringhelli Learning descriptors from materials science (big) data 22.03.2016 15:00
Reinhard J. Maurer Structure and Dynamics of Functional Molecules on Surfaces 22.03.2016 10:00
Prof. Johann Rafelski Electron and its mass 17.03.2016 14:00
Vincent Pichot Synthesis and applications of detonation nanodiamonds 17.03.2016 10:00
Xavi Marti Spintronics from nano to geo: antiferromagnetic memories, parkings and volcanoes 17.03.2016 10:00
M. M. Ugeda Low dimensionality effects in single layers of transition metal dichalcogenides 15.03.2016 10:00
Jörg Wunderlich Antiferromagnetic spintronics: Large magnitude magneto-resistance effects and current controlled switching 10.03.2016 10:00
Jan Kuneš Doping excitonic insulator: a way to new quantum states 01.03.2016 15:00
Antonio Cammarata Electro-Structural Coupling effects on "Intrinsic Friction" in Transition Metal Dichalcogenides 23.02.2016 15:00
Yousra Tahri Crystallization of L-Glutamic acid: Comparison between stirred and stagnant conditions 23.02.2016 13:00
Giniyat Khaliullin Excitonic magnetism and doping effects in Van Vleck-type Mott insulators 16.02.2016 15:00
Tobias Meier, Rémy Pawlak Charge distribution of adsorbed single molecules: the effect of the underlying surface 11.02.2016 15:00
Karel Výborný Anomalous Hall Effect in antiferromagnets 09.02.2016 10:00
Katerina Dohnalova Surface engineering of indirect bandgap semiconductor nanoparticles for enhanced optical properties 04.02.2016 13:00
Josef Kudrnovský Anomalous Hall effect in disordered alloys: first-principle study 26.01.2016 15:00
ELI Beamlines jako šance pro akademický výzkum 26.01.2016 13:00
Nicolás Lorente Physics of magnetic adsorbates 26.01.2016 10:00
Petr Kužel Perspectives of terahertz and multi-terahertz spectroscopy in the time domain 26.01.2016 10:00
Dr. Bogdan Voisiat Direct laser interference patterning technique as a flexible tool for surface patterning 21.01.2016 15:30
Dr. Sergejus Orlovas Polarisation-tailored focal spot engineering: generation, characterisation and applications 21.01.2016 15:00
Dr. Gediminas Račiukaitis How to employ ultra-short pulse lasers for precise material processing 21.01.2016 14:00
Oscar Custance Atomic scale characterisation of pentacene and C60 on the anatase (101) surface using atomic force microscopy 19.01.2016 10:00
Karel Carva Ultrarychlá magnetizační dynamika a spintronika: informace z ab initio výpočtů 19.01.2016 10:00
Joris More-Chevalier Magnetoelectric coupling in Tb0.3Dy0.7Fe2/Pt/ PbZr0.56Ti0.44O3 thin films deposited on Pt/TiO2/SiO2/Si substrate 12.01.2016 10:00
Steven Schofield Defects and molecules at silicon surfaces. 12.01.2016 10:00
Jakub Železný Spintronics with Antiferromagnets 08.01.2016 10:00
Jiří Hlinka Relaxor ferroelectrics: questions and answers 05.01.2016 10:00

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