Fyzikální ústav Akademie věd ČR

Semináře

Surface engineering of indirect bandgap semiconductor nanoparticles for enhanced optical properties

Čt, 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

Út, 09/02/2016 - 10:00 - 11:30

Karel Výborný (FzÚ)

(Přednáška o článku Nature 527, 212 (2015) ze série Journal Club.) The common notion that the anomalous Hall effect (AHE) is propor- tional to magnetisation M suggests that antiferromagnets with M = 0 should exhibit no AHE. Despite this intuition, when certain symmetries are broken, AHE was still predicted to appear in multi-sublattice antiferromagnets with M = 0 (such as IrMn3 or Mn3Sn). Re- cently, 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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Minulé semináře
Gustau Catalan "Flexoelectricity: What is it, and why does it matter" 18.05.2012 10:00
Victor V. Kukhtin JINR participation in ATLAS upgrade 17.05.2012 15:00
Wilfried Schranz Dynamic elasticity of materials 15.05.2012 15:00
Michael Sentef Theoretical Approaches to Time Domain Spectroscopies: Learning about Electrons, Lattice, Equilibria, and New States of Matter 15.05.2012 14:30
Prof. Hamid Oughaddou Growth of Silicene 14.05.2012 15:00
Pavel Augustinský Continuous-Time Estimators in Hybridization-Expansion Continuous-Time Quantum Monte Carlo 10.05.2012 14:00
Martin Fibrich Seminář o laserových a optických technologiích na ZČU v Plzni 10.05.2012 12:05
Martin Fibrich Seminář o laserových a optických technologiích na Masarykově univerzitě 09.05.2012 16:00
Ing. Štěpán Stehlík, Ph.D. Electrical potentials of nanodiamonds with different surface terminations evaluated by Kelvin probe force microscopy 09.05.2012 09:30
Carlito S. Ponseca Charge carrier dynamics in polymer solar cell materials probed by time resolved terahertz spectroscopy 03.05.2012 10:00
Oldřich Kepka, Martin Zeman Měření účinného průřezu produkce WW v experimentu ATLAS 27.04.2012 13:30
Martin Fibrich Seminář o laserových a optických technologiích 26.04.2012 15:00
Irinel Caprini Novel perturbation expansions in QCD and applications: a conformal mapping approach 26.04.2012 15:00
Falak Sher Synthesis and Properties of La/BiMnO3 Multiferroics 26.04.2012 10:00
Karel Rohlena Exotické technologie na ELI beamlines 25.04.2012 14:00
Jiří J. Mareš Využití Thompsonova-Lampardova teorému při měření specifických odporů 25.04.2012 10:00
Vladislav Pokorný Vertex corrections to the electrical conductivity of the disordered Falicov-Kimball model 24.04.2012 15:00
Amadeo L. Vázquez de Parga Graphene on Ru(0001): A nanostructured surface 24.04.2012 10:00
Prof. Dr. Beata Ziaja-Motyka Computer simulations of FEL-excited matter 23.04.2012 13:00
Pavel Středa Spin polarization of Bloch states and Hall currents in zinc-blend semiconductors 18.04.2012 10:00
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
Seminář o Scanning Microwave Microscopy 17.04.2012 10:00
Roland Winkler Emergent Electromagnetism in Bilayer Graphene 16.04.2012 11:00
Jakub Cúth Metoda unfoldingu v analýze nábojové asymetrie páru top kvarků 13.04.2012 14:10
Roman Lysák Nábojová asymetria v produkcii páru top kvarkov v experimente ATLAS 13.04.2012 13:30
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
Dr. Danijela Rostohar Development and applications of lasers: how to make a laser suitable for industrial application 10.04.2012 10:30
Prof. Andrzej Maziewski Spin Ordering and Magnetization Processes in Nanostructures: from Ultrathin Films to Multilayers 30.03.2012 10:00

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