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
Zdeněk Jirák Magnetický stav perovskitů La0.7Sr0.3CoO3, Nd0.7Sr0.3CoO3, Pr0.7Ca0.3CoO3 a Nd0.7Ca0.3CoO3 30.05.2013 14:00
Fedir Borodavka PFM and Raman study of ferroelectric domain structure in PbTiO3 thin films 28.05.2013 10:00
Prof. Ekhard Salje Tweed microstructures and Linear-quadratic Coupling in Phase Transitions 17.05.2013 14:15
Alex Matos–Abiague Spin-orbit coupling fields in hybrid ferromagnet/semiconductor heterostructures 17.05.2013 10:00
Suk Bong Kang Recent development of ultra-fine-grained metallic materials and magnetic powders at KIMS 16.05.2013 14:00
Rouin Farshchi Spin injection in ferromagnet/semiconductor hybrid structures: building blocks to spintronic circuits 16.05.2013 14:00
Iegor Rafalovskyi Raman scattering studies of relaxor piezoelectrics 16.05.2013 10:00
Ing. Alexander Shick, CSc. Intermediate valence in Pu and Pu-based superconductors 15.05.2013 15:00
Anna Kauch Continuous replica symmetry breaking in mean-field spin-glass models: Perturbation expansion without the replica trick 14.05.2013 15:00
Michal Otyepka Non-covalent Interactions to Graphene: Theory and Experiment 14.05.2013 10:30
Exkurze na PALS 14.05.2013 10:00
Warren E. Pickett Superconductivity and Two-­ dimensionality: Experimental Facts, Theoretical Issues 09.05.2013 15:00
Igor P. Raevski Studies of phase transitions in Fe containing ternary perovskite multiferroics 07.05.2013 10:00
Ing. Martin Smrž, Ph.D. Aplikace laserů 06.05.2013 09:30
Laserový den na UPOL 02.05.2013 09:30
Alan Sneddon Manažerské výzvy a rizika během výstavby nejintenzivnějšího laseru světa 30.04.2013 15:00
Josef Kudrnovský Spin-disordered resistivity of ferromagnetic metals: the disordered local moment approach 30.04.2013 15:00
Dr. František Fendrych Aktuální výsledky skupiny uhlíkových nanostruktur - pracovní seminář odd. 11 30.04.2013 14:00
Huibing Mao Luminescence Modes in the Semiconductor Micro Structure 29.04.2013 13:00
Dr. Simone Babuin, Dr. Tymofiy Chagovets, Dr. Zdeněk Janů Aktuální výsledky Společné laboratoře nízkých teplot - pracovní seminář odd. 11 23.04.2013 14:00
Dr. Ing. Klaus Kuhnen An Operator Calculus for Modeling and Compensation of Complex Memory Nonlinearities in Smart Material Systems 23.04.2013 10:00
Laserový den na UTB 22.04.2013 12:15
Ing. Martin Smrž, Ph.D. Speciální druhy laserů II – lasery emitující UV a rentgenové záření 22.04.2013 09:30
M. Etzkorn Following dynamics at the atomic scale: The relaxation of a spin measured by time resolved STM 19.04.2013 14:00
Miroslav Veverka Magnetické ferity ve službách lékařských věd – kobaltnato-zinečnatý ferit 18.04.2013 14:00
Michal Šumbera Aktivity skupiny ultrarelativistických těžkých iontů ÚJF AV ČR v experimentech ALICE a STAR 18.04.2013 14:00
Carmen S. Menoni Discovering the nano-world with bright laser beams of extreme ultraviolet light 17.04.2013 15:00
Alexander Shick Electronic structure and magnetic properties of selected transuranium compounds 16.04.2013 15:00
Volodymyr Skoromets a Václav Janovec Tunability of materials and structures for THz spectral range; Dvojčata, domény, hybridní struktury 16.04.2013 10:00
Ing. Martin Smrž, Ph.D. Speciální druhy laserů – optické parametrické generátory, ramanovské lasery 15.04.2013 09:30

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