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. Hiromitsu Kiriyama Progress towards ultra-high intensity laser 21.02.2014 09:00
Gunther Eggeler On the use of advanced transmission electron microscopy for characterizing elementary transformation and deformation processes in shape memory alloys and high temperature materials 18.02.2014 14:00
Robert Král Study of crystal growth by directional crystallization methods 11.02.2014 13:00
Lukáš Ondič Silicon nanocrystals, photonic structures and optical gain 06.02.2014 15:00
Jiří Chudoba, Oldřich Kepka ATLAS experiment data processing at the Goliáš computer farm 06.02.2014 14:00
Balazs Ujfalussy Quasiparticle spectrum of superconductor-normal metal heterojunctions 06.02.2014 10:00
Jan Mašek and Jakub Železný Electronic Structure of MnTe: Restrospective and News 04.02.2014 15:00
Jindřich Kolorenč Kvantové Monte Carlo simulace elektronové struktury pevných látek 04.02.2014 10:00
Michal Malinský Baryon and lepton number violation in the Standard Model and beyond 29.01.2014 14:00
Egbert Zojer Using Quantum-Mechanical Modelling to Understand the Role of Interfaces in Organic Electronics 28.01.2014 10:00
Tomáš Laštovička News from the LCWS 2013 Conference - latest news about the ILC collider construction in Japan 16.01.2014 14:00
Victor M. García-Suárez Thermoelectric properties of molecular junctions 14.01.2014 10:00
J. Kulveit Beyond Classical Nucleation Theory 07.01.2014 13:00
Petr Vopěnka Full rehabilitation of the calculus infinitesimalis by Newton and Leibniz 17.12.2013 15:00
Nora Abdellaoui Design of plasmonic rare earth phosphor films by Pulsed Laser Deposition 17.12.2013 10:00
Martina Boháčová Cosmic rays detection methods - fluorescence and microwave 12.12.2013 14:00
Ruslan Temirov How much control over single molecules could one get with the junction of a scanning probe microscope? 10.12.2013 10:00
A.J. Weymouth Tabletop AFM, and, an interesting observation when probing forces and currents 03.12.2013 10:00
Dr. Pawel Perkovski & Dr. Wiktor Piecek 1) Relaxation modes close to SmA* - SmCa* phase transitions + 2) Optically addressed diffractive structures 03.12.2013 10:00
Peter Markoš Numerical Analysis of Anderson localization 29.11.2013 10:00
Viktor Holubec Theoretical description of non-equilibrium energy transformation processes on the level of molecular structures 26.11.2013 15:00
Jeongsu Lee Nodal “ground states” and orbital textures in semiconductor quantum dots 26.11.2013 13:00
Prof. Bernard Hehlen Peculiarity of the low frequency dynamics of ferroelectric relaxors 19.11.2013 10:00
Prof. Sean Li Self-assembly of CeO2 Nanocubes: New Approach for the Development of Resistive Random Access Memory Devices 15.11.2013 14:00
E. Mihóková, P. Novák Crystal field and magnetism with Wannier functions: rare-earth ions in garnets, manganites and cobaltates 14.11.2013 14:00
Jiří Chudoba Current trends in data processing - CHEP 2013 and HEPIX conferences report 14.11.2013 14:00
Tadeusz Domański Superconducting fluctuations in the electron systems with real-space pairs 12.11.2013 15:00
Peter Moulton Ti:sapphire Lasers: Past, Present and Future 06.11.2013 15:00
Istvan Kezsmarki New optical phenomena in multiferroic materials 05.11.2013 15:00
Prof. Shigeki Tokita Development of high-power mid-infrared Er fiber lasers 04.11.2013 14:30

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