Fyzikální ústav Akademie věd ČR

Semináře

Surface engineering of indirect bandgap semiconductor nanoparticles for enhanced optical properties

Čtvrtek, 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

Úterý, 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
Oleg Lunov Advanced Physical Methods in Cell Biology and Nanomedicine 19.03.2014 15:00
Neda Neykova ZnO nanosloupky pro tenkovrstvé křemíkové sluneční články s vysokou účinností 18.03.2014 13:00
Ing. Jozef Vincenc Oboňa, PhD. Lased-induced Periodic Surface Structures (LIPSSs) Initiation and “growth” 18.03.2014 13:00
Sergey Varlamov LASER CRYSTALLISED SILICON THIN FILMS AND SOLAR CELLS ON GLASS: SIGNIFICANC OF THE INTERFACE 18.03.2014 10:00
Aurélien Manchon / Dominique Givord Spin-Orbit Caloritronics / Electric Field Effects on Magnetism in Metals 14.03.2014 10:00
Maria Valentyuk Microscopic picture of magnetic frustration effects and related phenomena in novel materials 12.03.2014 15:00
Kristin Poduska The role of electrochemistry in semiconductor growth and degradation 06.03.2014 10:00
Karel Carva Calculating ultrafast magnetization dynamics 04.03.2014 15:00
Katharina J. Franke Magnetic properties of single molecules and metal-organic networks on surfaces 04.03.2014 13:00
Jiří Červenka Chemical sensing by graphene field effect transistors 04.03.2014 10:00
Marek Taševský FCC – Future Circular Collider Study - informace z Kick-off workshopu 27.02.2014 14:00
František Máca The influence of adsorbates on the magnetic structure of the Fe/Ir(001) surface 25.02.2014 15:00
Prof. Shuji Sakabe Research activities of Laboratory for Laser-Matter Science, Institute for Chemical Research 21.02.2014 11:50
Prof. Lalit M. Kukreja Laser Surface Modifications and Additive Manufacturing: Recent Developments at RRCAT 21.02.2014 11:00
Dr. Al Erlandson Energetics Modeling and Slit Filters for Diode- Pumped Solid-State Lasers 21.02.2014 09:50
Dr. Hiromitsu Kiriyama Progress towards ultra-high intensity laser 21.02.2014 09:00
Gunther Eggeler On the use of advanced transmission electron microscopy for characterizing elementary transformation and deformation processes in shape memory alloys and high temperature materials 18.02.2014 14:00
Robert Král Studium růstu krystalů metodami směrové krystalizace 11.02.2014 13:00
Lukáš Ondič Silicon nanocrystals, photonic structures and optical gain 06.02.2014 15:00
Jiří Chudoba, Oldřich Kepka Zpracování dat experimentu ATLAS na farmě Goliáš 06.02.2014 14:00
Balazs Ujfalussy Quasiparticle spectrum of superconductor-normal metal heterojunctions 06.02.2014 10:00
Jan Mašek a Jakub Železný Electronic structure of MnTe: Restrospective and news 04.02.2014 15:00
Jindřich Kolorenč Kvantové Monte Carlo simulace elektronové struktury pevných látek 04.02.2014 10:00
Michal Malinský Baryon and lepton number violation in the Standard Model and beyond 29.01.2014 14:00
Egbert Zojer Using Quantum-Mechanical Modelling to Understand the Role of Interfaces in Organic Electronics 28.01.2014 10:00
Tomáš Laštovička Novinky z konference LCWS 2013 aneb aktuality o výstavbě urychlovače ILC v Japonsku 16.01.2014 14:00
Victor M. García-Suárez Thermoelectric properties of molecular junctions 14.01.2014 10:00
J. Kulveit Neklasická nukleační teorie 07.01.2014 13:00
Petr Vopěnka Úplná rehabilitace Newtonova a Leibnizova infinitezimálního počtu 17.12.2013 15:00
Nora Abdellaoui Design of plasmonic rare earth phosphor films by Pulsed Laser Deposition 17.12.2013 10:00

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