Fyzikální ústav Akademie věd ČR

Seminars

Surface engineering of indirect bandgap semiconductor nanoparticles for enhanced optical properties

Thu, 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

Tue, 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
Seong Hee Park Research activities on laser-plasma electron acceleration and gamma-ray generations at KAERI 20.04.2011 14:00
Kitae Lee Interaction of ultraintense laser pulse with plasmas for the generation of a high energy proton beam and an ultrashort x-ray pulse 20.04.2011 14:00
Jiří Pešek Some aspects of non-equilibrium thermodynamics for small stochastic systems - part II 29.03.2011 15:00
Miroslav Havránek Upgrade of pixel detector in the ATLAS Experiment 25.03.2011 13:30
B. Rus, K. Rohlena Major thematic physics projects in the ELI-Beamlines laser facility: ultra-intense sources of radiation and accelerated particles, exotic physics 23.03.2011 15:00
Mojmír Šob Studium struktury a magnetismu hranic zrn v železe a v niklu z prvních principů 22.03.2011 15:00
Andreas Heinrich Probing the energetics and dynamics of individual atomic spins on surfaces 21.03.2011 15:00
Pavel Jež Search for NMSSM in the Higgs sector with the ATLAS detector 18.03.2011 13:30
Milan Krtička The origin of heavy elements in the Universe 17.03.2011 15:00
Karel Netočný Some aspects of non-equilibrium thermodynamics for small stochastic systems - part I 15.03.2011 15:00
Ali Sadeghi Minima Hopping Method: Structure prediction of nano-systems. Multiscale simulation of Kelvin probe force microscopy. 14.03.2011 14:00
Axel Hoffmann Pure Spin Currents: Discharging Spintronics 07.03.2011 15:00
Azamat Elmurodov Phase-slip phenomena in NbN superconducting nanowires with leads 24.02.2011 14:00
Antonín Fejfar Microscopic study of silicon thin films 23.02.2011 15:00
Balazs Ujfalussy Interactions between magnetic impurities on surfaces of noble metals and alloys 22.02.2011 15:00
Jan Hladký Physics at IHEP Serpukhov 1970 - 1990 (BIS-1 and BIS-2 experiments or What we also did since our beginnings) 17.02.2011 15:00
Bohdan Hejna Basics Ideas of Information Thermodynamics 16.02.2011 10:00
Pavel Středa Anomalous Hall conductivity: local orbitals approach 15.02.2011 15:00
Michal Svatoš Measurement of differential cross section of the processes gamma + b(c) + X at the ATLAS experiment 11.02.2011 13:30
Leonid Glebov Laser beam control and fine spectral filtering by volume Bragg gratings in PTR glass 10.02.2011 10:00
P. Wissgott Analysis of thermoelectric materials with LDA+DMFT 08.02.2011 15:00
Prof. Jean-Philippe Ansermet High Field Dynamic Nuclear Polarization using Gyrotrons 07.02.2011 10:00
Michal Marčišovský Muons and the angular correllations of B hadrons in the ATLAS detector 28.01.2011 13:30
Oldřich Kepka Spectra of charged particles in minimum bias interactions measured by the ATLAS detector 21.01.2011 13:30
Valentina Domenici The role of NMR to study partially ordered systems: perspectives and few examples 20.01.2011 10:00
Hyung Taek Kim Development of PW laser system at APRI and its applications 10.01.2011 14:00
Karel Výborný, Sigurdur I. Erlingsson Non-local signal on Ag/Py spin-valve devices: beyond Hanle effect 07.01.2011 11:00
Miloš Jirsa Energy accumulation and high-T_c superconductors 15.12.2010 15:00
Dr. András Berkó Tailored formation of composite nanoparticles on TiO2(110) surfaces 15.12.2010 15:00
D. Nohavica, E. Hulicius Nanotechnology Safety - rizika nanomateriálů a nanotechnologií 15.12.2010 10:30

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