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
Krzysztof Jakubczak Ultrafast soft x-ray beamline at PALS 12.05.2010 14:00
Roman Gröger Mezoskopický popis strukturálních fázových transformací v materiálech s variabilní dislokační hustotou 12.05.2010 10:00
Josef Klusoň (Masarykova univerzita, Brno and CERN, Geneva) Gravity or Thermodynamics or what E. Verlinde says 10.05.2010 15:00
Prof. Chen-Ti Hu and Yuan-Hong Lo Fe-Pd-X shape memory alloys and their properties 06.05.2010 10:00
Frank Grosse, Paul Drude Institute for Solid State Electronics, Berlin, Germany Modeling of condensed matter systems based on ab initio results 04.05.2010 15:00
Deepa Kasinathan Relation of structure, magnetism, doping and pressure in AFe{2-x}TxAs2 (A=Ca,Sr,Ba,Eu; T=Co,Rh,Ru) 29.04.2010 14:00
Workshop on special problems of Magnetic Shape Memory Alloys 24.04.2010
Josef Schmiedberger Hybridní RF/DC plazmatron pro generaci singletového kyslíku v kyslík-jódovém laseru 21.04.2010 14:00
J. Repp Scanning Tunneling Spectroscopy of Molecules on Thin Insulating Films 13.04.2010 15:00
Jiří Kulda Neutron scattering studies of nano-scale order and dynamics in the PMN relaxor ferroelectric 08.04.2010 10:00
Leonid Nemenov (JINR, Dubna, Russia) DIRAC experiment at CERN: results and plans 25.03.2010 15:00
Carlos Pecharromán and Jose L. Menéndez Transparent ceramics: Processing, sintering, characterization and applications 25.03.2010 10:00
Jan Kuriplach Magnetic grain boundaries in Ni and Fe and defect structure in zirconia-based materials 23.03.2010 15:00
František Máca Magnetic order in the ultrathin iron film on the Ir(001) surface 09.03.2010 15:00
Petříček, Dušek, Palatinus The Third Ad Hoc Workshop on Jana2006 08.03.2010 09:00
Liviu P. Zarbo, FZÚ AV CR, v.v.i. and Texas A&M University Semiclassical Monte Carlo Simulation of Transport in Spintronic Devices 03.03.2010 09:00
Dr. Tomáš Novotný, Katedra fyziky kondenzovaných látek, MMF UK Phonon-Assisted Current Noise in Molecular Junctions 02.03.2010 15:00
Branislav K. Nikolić, Dept. of Physics and Astronomy & Center for Spintronics and Biodetection, University of Delaware Spin pumping in magnetic tunnel junctions and topological insulators: Theory and experiments 25.02.2010 10:00
Dr. Roman Martoňák, Katedra experimentálnej fyziky FMFI UK Bratislava Simulácia štruktúrnych fázových prechodov v kryštáloch pomocou metadynamiky 23.02.2010 10:00
André Perrin Ferroelectric KTa1-xNbxO3 Thin Film for Telecom Applications 16.02.2010 10:00
M.Spousta, P. Řezníček, M. Marčišovský, O.Kepka První jety v datech, Monitorování b-triggeru, Dimionový kanál, Minimum bias interakce (experiment ATLAS) 05.02.2010 13:30
prof. Stuart Lindsay, Biodesign Institute, Arizona State University Can we exploit quantum mechanics to read genes? 04.02.2010 15:00
Jan Kuneš From Clusters to Crystals: Application of the Dynamical Mean-Field Theory to Materials 02.02.2010 15:00
Petříček, Dušek, Palatinus The Second Ad Hoc Workshop on Jana2006 18.01.2010 09:00
Jan Böhm Upgrade Vnitřního detektoru ATLAS 15.01.2010 13:30
Jan Rusz Dynamical screening effects in X-ray absorption spectra of graphene and BN 05.01.2010 15:00
Ing. Luděk Kraus, CSc. Unconventional soft magnetic materials and their application 14.12.2009 14:00
Dawei Wang Dielectric responses of Pb(Zr,Ti)O3 from first principles in the terahertz frequency range 10.12.2009 10:00
Narayani Choudhury Unusual phenomena in compositionally modulated BST systems 08.12.2009 10:00
Timo Jacob (Institut für Elektrochemie, Universität Ulm,Germany) Fundamentals of the Oxygen Reduction Reaction 27.11.2009 10:30

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