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
Dr. Roman V. Yusupov Experimental manifestations of the Nb4+ O- polaronic excitons in KTa(1-x)Nb(x)O(3): Photo-induced EPR and optical absorption. 11.11.2011 10:00
Vlastimil Křápek Dynamical mean field modeling of LaCoO3 10.11.2011 14:00
František Slanina Spectra and localization in random graphs 08.11.2011 15:00
Xavier Marti Quo Vadis Spintronics? 08.11.2011 10:00
Marcus Kollar Correlated electrons in nonequilibrium 03.11.2011 15:00
Adam Sweetman Atom manipulation and sub-molecular imaging using qPlus NC-AFM 02.11.2011 14:00
Prokop Hapala Teoretické studium optických vlastností křemíkových nanokrystalů metodou funkcionálu elektronové hustoty 01.11.2011 15:00
Joachim Krug Records in a changing world 01.11.2011 14:00
Dr. Christian David Diffractive optics for imaging on x-ray tubes, synchrotrons, and free-electron lasers 27.10.2011 10:00
Venkatesan Jambunathan Ho doped potassium rare earth double tungstate laser operating around 2.1 μm 26.10.2011 11:00
Jakub Šebera Quantum Chemistry Study of Porphyrin and Phthalocyanine Systems within DFT Methods 25.10.2011 15:00
Nicoleta Nicoara Structural and electronic properties of PTCDA organic molecules on semiconductor surfaces 25.10.2011 10:00
Jiří Chýla Hlavní výsledky z LHC: dojmy z letních konferencí 21.10.2011 13:30
Jan Hladký Částicová zlatá léta sedmdesátá (aneb naše začátky IV) - Elektronické experimenty v CERN a ÚFVE Serpuchov (via LVE SÚJV Dubna) 20.10.2011 15:00
Pavel Augustinský Parquet equations as impurity solver 20.10.2011 14:00
E. Hulicius, J.J. Mareš, F. Kadlec Transportní vlastnosti železem dotovaného nitridu gallitého 19.10.2011 15:00
Pavel Augustinský Stability of Fermi liquid with respect to dynamical fluctuations in strongly correlated electron systems 18.10.2011 15:00
Rüdiger-A. Eichel Interplay between defect structure and piezoelectric properties of Pb[Zr,Ti]O3 and ‘lead-free’ alternative compounds 18.10.2011 10:00
Miloš V. Lokajíček Kvantová fyzika bez pozorovatelů a paradoxů? 13.10.2011 15:00
Christian Teichert AFM based characterization of inorganic and organic semiconductor nanostructures 13.10.2011 14:00
Jean Paul Perin The extreme cold in the service of science 12.10.2011 15:00
Nickolay Gennadievich Galkin Struktura, luminescence a termoelektrické vlastnosti křemíkových a silicidových nanoheterostruktur s vnořenými nanokrystaly 12.10.2011 13:45
Konstantin Nickolaievich Galkin Termoelektrické vlastnosti křemíkových dvojitých heterostruktur s vnořenými MgSi 2D strukturami 12.10.2011 13:00
John E. Pask Enriched and high-order finite elements for large, accurate ab initio electronic structure calculations 04.10.2011 15:00
Dr. Baerbel Rethfeld Electronic processes occurring in solids irradiated by ultra-short XUV/Vis laser pulses: theory and computer simulations 04.10.2011 13:00
László Szunyogh Multiscale study of magnetism at the nanoscale: highlighting spin-orbit induced phenomena 30.09.2011 10:00
prof. Andreas Pöppl Cw and Pulsed ESR Spectroscopy of Paramagnetic Centers in Porous Materials 27.09.2011 14:30
O. Mryasov Fundamentals of MR-RA scaling: TMR and GMR 16.08.2011 10:00
Jan Jacob InAs Spinfilter Cascades 10.08.2011 10:00
Natalia Kovaleva Spin-orbital effects in Mott-Hubbard optical bands in LaMnO3 02.08.2011 10:00

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