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
Pablo Merino Single photon emission in STM-induced luminescence from fullerene excitons 10.02.2015 10:00
Dr. Barbara Trzeciak Heavy flavor era at RHIC 05.02.2015 14:00
Anna Fucikova Various ways of preparing and modifying silicon nanocrystals 03.02.2015 10:00
Karel Výborný Terahertz Spectroscopy of Artificial Graphene 22.01.2015 14:00
Pavel Márton Phase­‐field simulation of dielectric response of multidomain BaTiO3 20.01.2015 10:00
Giuseppe Foti Elastic and inelastic electron transport through alkane-based molecular junctions 13.01.2015 10:00
Alexander V. Bulgakov Time‐of‐flight Mass spectrometry in laser‐matter interaction studies 12.01.2015 15:00
A. P. Kamantsev Direct Measurements of Magnetocaloric Properties of Magnetics in Bitter Magnet: New Techniques & Materials 08.01.2015 14:30
Peter Mohn Research at the Center for Computational Materials Science (CMS) 16.12.2014 15:00
Peter Liljeroth Low-temperature STM on molecules and atomically well-defined graphene structures 16.12.2014 10:00
Prof. Cristian FOCSA Laser Ablation Fundamentals and Applications 15.12.2014 15:00
Prof. Jan P. F. Lagerwall and Dr. Giusy Scalia Playing with liquid crystal bubbles and Molecular wires from discotic liquid crystals 15.12.2014 10:30
Prof. Sebastiaan van Dijken Electric-Field Control of Magnetic Domain Wall Motion in Ferromagnetic-Ferroelectric Heterostructures 09.12.2014 13:00
Johannes V. Barth Nanochemistry at surfaces: From single molecules to complex ensembles and dynamics 09.12.2014 10:00
Prof. Ken-ichi Ueda Paradigm Shifts in High Power Laser Technology 09.12.2014 09:30
Prof. Marc Henneaux Three-dimensional gravity: a superb theoretical laboratory 03.12.2014 14:00
Jan Zemen Ab initio study of piezomagnetic effect in Mn-antiperovskites 01.12.2014 10:00
Dr. Marzena Tykarska Miscibility studies of liquid crystals and non-additive behaviour 20.11.2014 10:00
Martin Setvin Excess Electrons in TiO2 Anatase and Rutile: Delocalized Solutions and Localized Small Polarons 18.11.2014 10:00
Christian Teichert Growth of small organic molecules on graphene 14.11.2014 14:00
M. Chrunik New Oxide Materials for Nonlinear Optical Applications 11.11.2014 10:00
Prof. Alberto Morgante Charge transfer processes in organic nano- and hetero-structures 10.11.2014 15:00
Miroslav Havránek Sensors and electronics for the upgrade of pixel detector in the experiment ATLAS 30.10.2014 14:00
Dr. Andreas Undisz Oxide layers on biomedical NiTi alloy – formation mechanism, mechanical stability and consequences for short- and long-term Ni-release 30.10.2014 14:00
Artem Ryabov Diffusion of a tagged particle in open single-file systems 21.10.2014 15:00
Miloš V. Lokajíček Elastic scattering of protons and validity of the optical theorem in strong interactions 16.10.2014 14:00
Jiří Chýla How quarks were discovered 15.10.2014 15:00
Harald Oberhofer A theoretical description of water splitting on metal decorated oxide surfaces 14.10.2014 10:00
Richard Lednický Joint Institute for Nuclear Research in Dubna: past, presence and future 13.10.2014 14:00
Yasuo Koide Diamond Field Effect Transistors with high-k gate insulator 09.10.2014 10:00

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