Fyzikální ústav Akademie věd ČR

Seminars

Surface engineering of indirect bandgap semiconductor nanoparticles for enhanced optical properties

Thursday, 04.02.2016 13:00 - 14:00

Katerina Dohnalova (Institute of Physics, University of Amsterdam, Science Park 904, 1018XH Amsterdam, The Netherlands)

IV-group bulk crystalline semiconductors, Diamond (C), Silicon and Germanium, all possess diamond structure and indirect bandgaps. The latter property results in very poor emission and band-edge absorption, limiting their use in optoelectronic and photonic applications. In nanocrystal form, oscillator strength is enhanced via the spatial confinement of carriers, which leads to relaxation of the k-selection rule and band-mixing.

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Anomalous Hall Effect in antiferromagnets

Tuesday, 09.02.2016 10:00 - 11:30

Karel Výborný (Institute of Physics ASCR)

(A Journal Club Lecture.) The common notion that the anomalous Hall effect (AHE) is proportional to magnetisation suggests that antiferromagnets with zero magnetisation should exhibit no AHE. Despite this intuition, when certain symmetries are broken, AHE was still predicted to appear in multi-sublattice antiferromagnets with zero magnetisation (such as IrMn3 or Mn3Sn). Recently, this prediction has been confirmed experimentally and the magnitude of AHE was even found to exceed that of ordinary ferromagnetic metals.

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Past seminars
Prof. Dr. Beata Ziaja-Motyka Computer simulations of FEL-excited matter 23.04.2012 13:00
Serge Nakhmanson Ab initio design of multifunctional materials with advanced properties: Goldstone-like states in a layered perovskite with constrained polarization 17.04.2012 10:00
Seminar on Scanning Microwave Microscopy 17.04.2012 10:00
Roland Winkler Emergent Electromagnetism in Bilayer Graphene 16.04.2012 11:00
Jakub Cúth The method of unfolding in the analysis of chrage assymetry of top quark pairs 13.04.2012 14:10
Roman Lysák Charge asymmetry in top quark pair production in the ATLAS experiment 13.04.2012 13:30
ELI-Miniworkshop on Biological Imaging with Intense Ultra-Short x-Ray Pulses 13.04.2012 09:30
Prof. A.P. Levanyuk Ferroelectric phase transitions in thin films, ferroelectric-paraelectric superstructures and small particles: effects of the depolarizing field 11.04.2012 15:00
Dr. Jérôme Gaudin The European XFEL in Hamburg: current status 11.04.2012 13:30
Y.O. Kvashnin Ab initio study of 3d systems under high pressure 10.04.2012 15:00
Prof. Andrzej Maziewski Spin Ordering and Magnetization Processes in Nanostructures: from Ultrathin Films to Multilayers 30.03.2012 10:00
B. Reischl Simulating atomic force microscopy of calcite in water 29.03.2012 16:00
Dr. Konstantin Zhuravlev Exciton formation, transfer and recombination in semiconductor layers and quantum dot 28.03.2012 13:00
Jaroslav Bielčík Production of heavy quarks in collisions of nuclei 23.03.2012 13:30
Caroline Curfs In-situ studies in Materials Science using high energy X-rays at the ESRF 22.03.2012 14:00
Vladimir I. Anisimov DFT+DMFT method and its applications to correlation effects in electronic structure of real materials 16.03.2012 14:00
Pavel Jelínek Advanced characterization of surfaces and nanostructures with atomic resolution by means of Scanning Probe Microscopy 07.03.2012 15:00
Anna Kauch Spectral functions of correlated bosons in the dynamical mean-field theory 28.02.2012 15:00
Herve Grabas Frontier technologies in picosecond timing 24.02.2012 10:30
Marina Davydova New generation of toxic gas sensors 21.02.2012 13:00
Antonín Klíč Mean-field Theory of Potts Glass Revised 14.02.2012 15:00
Prof. Ing. Pavel LEJČEK, DrSc. Grain boundary segregation: Czech trace 08.02.2012 15:00
Mael Guennou Homogeneization of electromechanical properties of relaxor-based single-crystals 07.02.2012 10:00
J. Hlinka Ferroelectric Photovoltaics - Fact, fiction, hype ... or hope ? 26.01.2012 15:00
Olivier Isnard The determination of multiple cation location and ordering: example on natural and heat treated columbites 18.01.2012 15:00
Jan Lorinčík Application of SIMS in materials research 17.01.2012 10:00
Prof. Max Klein Particle Physics in Transition 11.01.2012 15:00
Jiří Grygar Astronomické pozadí Nobelovy ceny za fyziku 20.12.2011 15:00
Thomas Pruschke Téma: Monte-Carlo Approach to Stationary Non-equilibrium of Mesoscopic Systems 15.12.2011 15:00
Klaus Wandelt Electrochemical Surface Science 13.12.2011 15:00

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