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
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
Dr. Nektarios Chr. Benekos Detection techniques and data monitoring on ATLAS experiment. 24.06.2014 14:30
Prof. Juris Purans Synchrotron radiation XAFS studies of local structure with femtometer accuracy 23.06.2014 10:00
Dr. Valentina Scuderi Hadron Therapy and Its Importance in Medicine 19.06.2014 14:00
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
Igor Bieloshapka Сomposite catalytic materials for improving direct formic acid fuel cells efficiency 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 Fabrication and characterization of selected carbon-based nano-structures 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
Petr Trávníček Highest energy cosmic rays at observatories CTA and Pierre Auger 16.04.2014 15:00
Dr. Otakar Frank Raman spectroscopy of graphene – basic characterization and beyond 08.04.2014 10:00
Pavel Cejnar Chaos in collective nuclear dynamics 03.04.2014 14:00
Vítězslav Jarý Thermally induced ionization and quenching processes in novel oxide and sulfide scintillation materials 01.04.2014 13:00
Dr. M. Gary Higher Spin Lifshitz Holography 28.03.2014 15:00
Karel Netočný Geometric and kinetic aspects of nonequilibrium steady states 25.03.2014 15:00

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