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
Dr. Y. J. Dappe An accurate DFT-based method for the treatment of weak and van der Waals interactions : the LCAO-S2+vdW formalism 25.05.2010 10:00
Pavel Středa Anomalous Hall conductivity: local orbitals approach 24.05.2010 16:00
Jean Zinn-Justin Path integrals in physics: the main achievements 20.05.2010 15:00
Katarzyna Roszak Non-Markovian noise at the Fermi edge singularity in quantum dots 18.05.2010 15:00
Michael Unger Studies of the Cosmic Ray Composition with the Pierre Auger Observatory 18.05.2010 14:00
Krzysztof Jakubczak Ultrafast soft x-ray beamline at PALS 12.05.2010 14:00
Roman Gröger Mezoskopický popis strukturálních fázových transformací v materiálech s variabilní dislokační hustotou 12.05.2010 10:00
Josef Klusoň (Masarykova univerzita, Brno and CERN, Geneva) Gravity or Thermodynamics or what E. Verlinde says 10.05.2010 15:00
Prof. Chen-Ti Hu and Yuan-Hong Lo Fe-Pd-X shape memory alloys and their properties 06.05.2010 10:00
Frank Grosse, Paul Drude Institute for Solid State Electronics, Berlin, Germany Modeling of condensed matter systems based on ab initio results 04.05.2010 15:00
Deepa Kasinathan Relation of structure, magnetism, doping and pressure in AFe{2-x}TxAs2 (A=Ca,Sr,Ba,Eu; T=Co,Rh,Ru) 29.04.2010 14:00
Workshop on special problems of Magnetic Shape Memory Alloys 24.04.2010
Josef Schmiedberger Hybridní RF/DC plazmatron pro generaci singletového kyslíku v kyslík-jódovém laseru 21.04.2010 14:00
J. Repp Scanning Tunneling Spectroscopy of Molecules on Thin Insulating Films 13.04.2010 15:00
Jiří Kulda Neutron scattering studies of nano-scale order and dynamics in the PMN relaxor ferroelectric 08.04.2010 10:00
Leonid Nemenov (JINR, Dubna, Russia) DIRAC experiment at CERN: results and plans 25.03.2010 15:00
Carlos Pecharromán and Jose L. Menéndez Transparent ceramics: Processing, sintering, characterization and applications 25.03.2010 10:00
Jan Kuriplach Magnetic grain boundaries in Ni and Fe and defect structure in zirconia-based materials 23.03.2010 15:00
František Máca Magnetic order in the ultrathin iron film on the Ir(001) surface 09.03.2010 15:00
Petříček, Dušek, Palatinus The Third Ad Hoc Workshop on Jana2006 08.03.2010 09:00
Liviu P. Zarbo, FZÚ AV CR, v.v.i. and Texas A&M University Semiclassical Monte Carlo Simulation of Transport in Spintronic Devices 03.03.2010 09:00
Dr. Tomáš Novotný, Katedra fyziky kondenzovaných látek, MMF UK Phonon-Assisted Current Noise in Molecular Junctions 02.03.2010 15:00
Branislav K. Nikolić, Dept. of Physics and Astronomy & Center for Spintronics and Biodetection, University of Delaware Spin pumping in magnetic tunnel junctions and topological insulators: Theory and experiments 25.02.2010 10:00
Dr. Roman Martoňák, Katedra experimentálnej fyziky FMFI UK Bratislava Simulácia štruktúrnych fázových prechodov v kryštáloch pomocou metadynamiky 23.02.2010 10:00
André Perrin Ferroelectric KTa1-xNbxO3 Thin Film for Telecom Applications 16.02.2010 10:00
M.Spousta, P. Řezníček, M. Marčišovský, O.Kepka První jety v datech, Monitorování b-triggeru, Dimionový kanál, Minimum bias interakce (experiment ATLAS) 05.02.2010 13:30
prof. Stuart Lindsay, Biodesign Institute, Arizona State University Can we exploit quantum mechanics to read genes? 04.02.2010 15:00
Jan Kuneš From Clusters to Crystals: Application of the Dynamical Mean-Field Theory to Materials 02.02.2010 15:00
Petříček, Dušek, Palatinus The Second Ad Hoc Workshop on Jana2006 18.01.2010 09:00
Jan Böhm Upgrade Vnitřního detektoru ATLAS 15.01.2010 13:30

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