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
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. SEMINAR CANCELLED 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
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
Václav Janiš Fulbright Scholar at Louisiana State University I: Thermodynamically consistent description of diffusion in disordered systems 27.10.2015 15:00

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