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
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
Martin Eckstein Nonequilibrium control of the magnetic exchange interaction 17.07.2014 14:00
Prof. Robert L. Byer LASERs at Stanford: from the Laboratory to Commercial Products 08.07.2014 10:00
Prof. Juris Purans Synchrotron radiation XAFS studies of local structure with femtometer accuracy 23.06.2014 10:00
Prof. Dr. Juan Carlos Cuevas Heat-dissipation in atomic-scale junctions 10.06.2014 10:00
Dr. Thibault Derrien Ultrashort laser processing of solids. Numerical investigation of sub-wavelength optical and thermal effects in nanomaterials 05.06.2014 16:00
Zdeněk Regner Prostorové soustavy minimálních ploch 04.06.2014 10:00
Igor Bieloshapka Kompozitní katalytické materiály pro zlepšení účinnosti palivového článku s kyselinou mravenčí 03.06.2014 13:00
Prof. Siegmund Greulich-Weber Photoelectrochemical Water Splitting 02.06.2014 10:00
Lucia Nasi Transmission electron microscopy study of semiconductor nanowires and nanostructured materials 28.05.2014 10:00
Prokop Hapala Is the Concept of Electronic Band Structure valid for Si Nanocrystals of few nm in Size? 27.05.2014 15:00
José M. Gómez-Rodríguez Probing and Modifying Graphene at the Atomic Scale with Scanning Tunneling Microscopy 27.05.2014 10:00
Antonio Lucianetti Physics behind 100J/10Hz laser for new scientific applications 21.05.2014 15:00
Soon Cheol Hong Roles of nonmagnetic elements on enhancement of perpendicular magnetocrystalline anisotropy: first-principles studies 13.05.2014 15:00
Krisztian Palotas STM contrast: The role of the tip 13.05.2014 10:00
Vladimír Zobač Non-adiabatic molecular dynamics with electron transitions 06.05.2014 15:00
Richard Berndt A STM approach to molecular conductance and the properties of ZnO 06.05.2014 15:00
Oleg Babchenko Příprava a charakterizace vybraných uhlíkových nano-struktur 06.05.2014 13:30
Prof. Nikolay Galkin Silicon-Silicide nanocomposite heterostructures for Silicon based photonics, opto- and thermoelectronics 06.05.2014 13:00
Romuald Lemański Gapless metallic charge-density-wave phase driven by strong electron correlations 29.04.2014 15:00
Magdaléna Hromadová Electrochemically addressable molecules for molecular electronics 29.04.2014 09:30
Roman Pasechnik Vector - like Technicolor at the LHC 28.04.2014 14:00
Gregorio Bernardi Recent Results from the Tevatron 23.04.2014 10:00
J. Enrique Ortega Electronic states at donor-acceptor/ metal interfaces probed with electron spectroscopies: NEXAFS, XPS and UPS 22.04.2014 10:00

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