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
Josef Kudrnovský Anomalous Hall effect in disordered alloys: first-principle study 26.01.2016 15:00
Nicolás Lorente Physics of magnetic adsorbates 26.01.2016 10:00
Petr Kužel Perspectives of terahertz and multi-terahertz spectroscopy in the time domain 26.01.2016 10:00
Dr. Bogdan Voisiat Direct laser interference patterning technique as a flexible tool for surface patterning 21.01.2016 15:30
Dr. Sergejus Orlovas Polarisation-tailored focal spot engineering: generation, characterisation and applications 21.01.2016 15:00
Dr. Gediminas Račiukaitis How to employ ultra-short pulse lasers for precise material processing 21.01.2016 14:00
Oscar Custance Atomic scale characterisation of pentacene and C60 on the anatase (101) surface using atomic force microscopy 19.01.2016 10:00
Karel Carva Ultrarychlá magnetizační dynamika a spintronika: informace z ab initio výpočtů 19.01.2016 10:00
Joris More-Chevalier Magnetoelectric coupling in Tb0.3Dy0.7Fe2/Pt/ PbZr0.56Ti0.44O3 thin films deposited on Pt/TiO2/SiO2/Si substrate 12.01.2016 10:00
Steven Schofield Defects and molecules at silicon surfaces. 12.01.2016 10:00
Jakub Železný Spintronics with Antiferromagnets 08.01.2016 10:00
Jiří Hlinka Relaxor ferroelectrics: questions and answers 05.01.2016 10:00
Christian Teichert Atomic-force microscopy based exploration of cellulose fibers and wood fiber - nanowire composites 22.12.2015 10:00
Sander Otte Atomic spin chains as testing ground for quantum magnetism 17.12.2015 15:00
Václav Cílek Ohlédnutí za rokem, ve kterém se klima stalo sociální silou 15.12.2015 15:00
Josef Redinger Complex structures and magnetism of thin Cobalt oxide films on Iridium 08.12.2015 15:00
Markus Terhorst Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS): A Success Story for All Kind of Applications in Surface and Interface Analysis 07.12.2015 13:00
Robert Stadler Devices in single molecule electronics based on quantum interference and redox switches 03.12.2015 15:00
Dr. Kamila Nowicka Non-linear electro-optical effects in the study of the helical smectic liquid crystals. SEMINAŘ ZRUŠEN 03.12.2015 11:00
Petr Hořava Surprises with Non-relativistic Naturalness 02.12.2015 15:00
Walter Hofstetter Competing quantum phases of lattice bosons with long-range interactions or large spin 01.12.2015 15:00
Dr. Andreas Huber NeaSNOM – nanoscale imaging and spectroscopy at VIS to IR to THz frequencies 27.11.2015 13:00
Prof. Luigi Lazzeri Fatigue life of aircraft structures: Issues for crack initiation and propagation modelling 26.11.2015 14:00
Dr. Jürgen Spitaler First-principles calculations of phonons, optical properties and Raman spectra in vanadium ladder compounds 24.11.2015 10:00
Rossitza Pentcheva Designing electronic phases at oxide interfaces for electronic, spintronic and energy applications 19.11.2015 15:00
César de Julián Fernández Magneto-plasmonics: a novel class of nanomaterials 12.11.2015 14:00
Aleš Jäger Elektronová mikroskopie: nástroj pro materiálovou charakterizaci v Oddělení progresivních strukturních materiálů 11.11.2015 15:00
Václav Janiš Fulbright Scholar at Louisiana State University II: Consistent description of quantum criticality of correlated electrons 10.11.2015 15:00
Dr. Ignacy Sawicki Dark Energy: Evidence and Future Prospects 06.11.2015 14:00
Philipp Werner Dynamical mean field approach to correlated lattice systems 03.11.2015 15:00

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