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
Alex Matos–Abiague Spin-orbit coupling fields in hybrid ferromagnet/semiconductor heterostructures 17.05.2013 10:00
Suk Bong Kang Recent development of ultra-fine-grained metallic materials and magnetic powders at KIMS 16.05.2013 14:00
Rouin Farshchi Spin injection in ferromagnet/semiconductor hybrid structures: building blocks to spintronic circuits 16.05.2013 14:00
Iegor Rafalovskyi Raman scattering studies of relaxor piezoelectrics 16.05.2013 10:00
Alexander Shick Intermediate valence in Pu and Pu-based superconductors 15.05.2013 15:00
Anna Kauch Continuous replica symmetry breaking in mean-field spin-glass models: Perturbation expansion without the replica trick 14.05.2013 15:00
Michal Otyepka Non-covalent Interactions to Graphene: Theory and Experiment 14.05.2013 10:30
Warren E. Pickett Superconductivity and Two-­ dimensionality: Experimental Facts, Theoretical Issues 09.05.2013 15:00
Igor P. Raevski Studies of phase transitions in Fe containing ternary perovskite multiferroics 07.05.2013 10:00
Josef Kudrnovský Spin-disordered resistivity of ferromagnetic metals: the disordered local moment approach 30.04.2013 15:00
Huibing Mao Luminescence Modes in the Semiconductor Micro Structure 29.04.2013 13:00
Dr. Ing. Klaus Kuhnen An Operator Calculus for Modeling and Compensation of Complex Memory Nonlinearities in Smart Material Systems 23.04.2013 10:00
M. Etzkorn Following dynamics at the atomic scale: The relaxation of a spin measured by time resolved STM 19.04.2013 14:00
Michal Šumbera Activities of the ultrarelativistic heavy ions group from the Institute of Nuclear Physics, AS CR, at ALICE and STAR experiments 18.04.2013 14:00
Dr. Vadim Smirnov Design and manufacturing of volume Bragg diffraction gratings in a phototermorefractive (PTR) glass for the pulse stretching and compression 18.04.2013 13:30
Carmen S. Menoni Discovering the nano-world with bright laser beams of extreme ultraviolet light 17.04.2013 15:00
Alexander Shick Electronic structure and magnetic properties of selected transuranium compounds 16.04.2013 15:00
Volodymyr Skoromets a Václav Janovec Tunability of materials and structures for THz spectral range; Dvojčata, domény, hybridní struktury 16.04.2013 10:00
J. Kaštil Magnetic properties and magnetocaloric effect of Co substituted Mn rich Ni2MnGa 11.04.2013 14:00
Šárka Todorova Hadronization and the Lund fragmentation model 11.04.2013 14:00
Jan Honolka Surface and material science perspectives of the new NanoESCA Lab 10.04.2013 15:00
Pavel Augustinský Improved Measurement of Green's Function in Hybridization Expansion Continuous Time Quantum Monte Carlo. 09.04.2013 15:00
Pavel Márton A brief excursion to the ferroelectric-domain-wall interior 09.04.2013 10:00
Ing. Filip Šroubek, Ph.D. Blind Deconvolution in Image Processing 09.04.2013 10:00
Sergej Moroz Super Efimov effect 04.04.2013 11:00
Fumitaka Ohashi Clathrates with group IV materials: novel photo-absorption materials for solar cells 28.03.2013 15:00
Xavier Marti Antiferromagnetic semiconductor spintronics 27.03.2013 10:00
Prof. Laurent Baulieu Minimizing gauge-functional for 2-d gravity and string theory 14.03.2013 15:00
Takatoshi Yamada Microscopic C-AFM/KPFM/Raman characterization of thermal and plasma CVD graphene 11.03.2013 15:30
Nava Setter Ferroelectric nano-wires 07.03.2013 15:00

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