Fyzikální ústav Akademie věd ČR

Seminars

Charged domain walls in BaTiO3 single-crystals

Tuesday, 20.10.2015 10:00 - 11:00

Dr. P. Bednyakov (École Polytechnique Fédérale de Lausanne, Switzerland)

Recently observed properties of charged ferroelectric domain walls (CDWs) make these structures promising for application in future electronics. It was demonstrated experimentally that the quasi two-dimensional electron gas is present at head-to-head CDWs [1]. The CDWs are therefore good conductors that can be moved by an external electric field. As suggested by theory [2] and experiment [3] CDWs with very low spacing may cause the enhancement of piezoelectric and dielectric properties. However, the problem of controlled regular growth and formation of CDWs is not well understood.

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In silico studies of electronic current in nano-junctions: Exciting atomic motion

Thursday, 22.10.2015 15:00 - 16:00

Mads Brandbyge (Department of micro and nanotechnology & Center for Nanostructured Graphene (CNG), Technical University of Denmark (DTU), Denmark)

In the Landauer approach to nanoscale transport the electrons are assumed to bypass a conducting junction ballistically and equilibrate through energy exchange in the electrodes.

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Interplay of charge, spin and thermal imbalances in normal-metal/ferromagnet bilayers

Friday, 23.10.2015 10:00 - 11:00

Can Onur Avci (ETH Zurich)

Recent demonstrations of magnetization switching driven by current-induced spin-orbit torques (SOTs) have drawn considerable attention in the field of spintronics. The SOTs are associated with the spin Hall and interfacial effects, and have been found to occur in a variety of normal-metal/ferromagnet systems. In this talk I will present harmonic transverse (Hall) and longitudinal (magnetoresistance) measurements on a variety of normal-metal/ferromagnet systems with a special focus on Pt/Co, Ta/Co layers with in-plane magnetization. I will discuss a new magnetoresistance effect (unidirectional spin Hall magnetoresistance) that we have recently discovered.

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Manipulation of magnetization by spin-orbit torques

Friday, 23.10.2015 14:00 - 15:00

Kevin Garello (ETH Zurich)

Recent demonstrations of perpendicular magnetization switching induced by in-plane current injection in ferromagnetic heterostructures have drawn attention to a class of spin torques based on orbital-to-spin momentum transfer.
After describing the main spin-orbit interactions observed in ferromagnetic heterostructures and some of our latest measurements, I will present their straightforward impact on magnetic memory technologies.

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Past seminars
Roman Lysák Charge asymmetry in top quark pair production in the ATLAS experiment 13.04.2012 13:30
ELI-Miniworkshop on Biological Imaging with Intense Ultra-Short x-Ray Pulses 13.04.2012 09:30
Prof. A.P. Levanyuk Ferroelectric phase transitions in thin films, ferroelectric-paraelectric superstructures and small particles: effects of the depolarizing field 11.04.2012 15:00
Dr. Jérôme Gaudin The European XFEL in Hamburg: current status 11.04.2012 13:30
Y.O. Kvashnin Ab initio study of 3d systems under high pressure 10.04.2012 15:00
Prof. Andrzej Maziewski Spin Ordering and Magnetization Processes in Nanostructures: from Ultrathin Films to Multilayers 30.03.2012 10:00
B. Reischl Simulating atomic force microscopy of calcite in water 29.03.2012 16:00
Dr. Konstantin Zhuravlev Exciton formation, transfer and recombination in semiconductor layers and quantum dot 28.03.2012 13:00
Jaroslav Bielčík Production of heavy quarks in collisions of nuclei 23.03.2012 13:30
Caroline Curfs In-situ studies in Materials Science using high energy X-rays at the ESRF 22.03.2012 14:00
Vladimir I. Anisimov DFT+DMFT method and its applications to correlation effects in electronic structure of real materials 16.03.2012 14:00
Pavel Jelínek Advanced characterization of surfaces and nanostructures with atomic resolution by means of Scanning Probe Microscopy 07.03.2012 15:00
Anna Kauch Spectral functions of correlated bosons in the dynamical mean-field theory 28.02.2012 15:00
Herve Grabas Frontier technologies in picosecond timing 24.02.2012 10:30
Marina Davydova New generation of toxic gas sensors 21.02.2012 13:00
Antonín Klíč Mean-field Theory of Potts Glass Revised 14.02.2012 15:00
Prof. Ing. Pavel LEJČEK, DrSc. Grain boundary segregation: Czech trace 08.02.2012 15:00
Mael Guennou Homogeneization of electromechanical properties of relaxor-based single-crystals 07.02.2012 10:00
J. Hlinka Ferroelectric Photovoltaics - Fact, fiction, hype ... or hope ? 26.01.2012 15:00
Olivier Isnard The determination of multiple cation location and ordering: example on natural and heat treated columbites 18.01.2012 15:00
Jan Lorinčík Application of SIMS in materials research 17.01.2012 10:00
Prof. Max Klein Particle Physics in Transition 11.01.2012 15:00
Jiří Grygar Astronomické pozadí Nobelovy ceny za fyziku 20.12.2011 15:00
Thomas Pruschke Téma: Monte-Carlo Approach to Stationary Non-equilibrium of Mesoscopic Systems 15.12.2011 15:00
Klaus Wandelt Electrochemical Surface Science 13.12.2011 15:00
Introduction on Geant4: an all-particle Monte Carlo transport code 12.12.2011 15:00
Lucia Baťková Calibration of the determination of b-jet charge with dijet events in the ATLAS experiment 09.12.2011 13:30
prof. Jiří Chýla, CSc. Too fast neutrinos? 07.12.2011 15:00
Robert Dittmer & Wook Jo Recent progress in the research of lead-free piezoceramics at TU Darmstadt 07.12.2011 10:00
Laurent Bellaiche Ferroelectric vortices from atomistic simulations 06.12.2011 10:00

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