Fyzikální ústav Akademie věd ČR

Semináře

Charged domain walls in BaTiO3 single-crystals

Út, 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

Čt, 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

Pá, 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

Pá, 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 (SOTs).
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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O. Mryasov Fundamentals of MR-RA scaling: TMR and GMR 16.08.2011 10:00
Jan Jacob InAs Spinfilter Cascades 10.08.2011 10:00
Natalia Kovaleva Spin-orbital effects in Mott-Hubbard optical bands in LaMnO3 02.08.2011 10:00
Dr. Peter Fouquet Microscopic friction and diffusion of surface adsorbed molecules measured in real time by neutron scattering 18.07.2011 17:00
Joe Trodahl Rare-Earth Nitrides: Intrinsic Ferromagnetic Semiconductors 15.07.2011 10:00
Zoltán Mics Electron dynamics and transport in nanocrystalline CdS studied by time-resolved THz spectroscopy 12.07.2011 10:00
B. Rosenstein Excitation spectrum of well pinned vortex matter 11.07.2011 14:00
Jan Hladký Naši emigranti z oddělení fyziky vysokých energií Fyzikálního ústavu ČSAV po roce 1968 23.06.2011 15:00
Ivo Nezbeda Modern statistical thermodynamics of fluids: State of the art, problems, and prospects 21.06.2011 15:00
Prof. Miha Čekada Surface growth defects in PVD coatings 21.06.2011 14:00
Dr. Milan Orlita Magneto-optické vlastnosti grafenu 21.06.2011 10:00
Ingo Allekotte Measurements of low energy radiation and other enhancements of the Pierre Auger Observatory 16.06.2011 15:00
Oliver Gutfleisch Magnetic materials in sustainable energy 14.06.2011 15:00
Dr. Alexandra Mougin Coupling with a multiferroic BiFeO3: control under electric field 13.06.2011 10:00
Karel Píška TeX: Nové směry rozvoje 09.06.2011 15:00
J. Vacek SELF-ASSEMBLY OF AZAHELICENES ON AG(1,1,1): STM AND COMPUTATIONAL STUDY 07.06.2011 15:00
RNDr. Lenka Poláková, PhD. Příprava uspořádaných polyurethanů na bázi kapalně-krystalických poly(butadien)diolů 07.06.2011 10:00
Petr Gallus, Martin Zeman Seminář z řady "Fyzikální program experimentu ATLAS" 03.06.2011 13:30
Victor Kukhtin Studies of ATLAS LAr calorimeter with beams of U-70 accelerator in Protvino 27.05.2011 10:30
Igor A. Savin Collaboration with Czech physicists in high energy experiments at Dubna, Serpukhov and CERN 26.05.2011 15:00
Jana Poltierová Vejpravová Nanočástice na bázi oxidů přechodných kovů: struktura a magnetismus 24.05.2011 15:00
B. Wecht New Tools for New SCFTs 24.05.2011 15:00
Dr. Ed Moses The National Ignition Facility and the Goal of Nearterm Laser Fusion Energy 23.05.2011 15:00
Jana Nováková Měření účinného průřezu procesu Z -> tau tau pomocí detektoru ATLAS 20.05.2011 14:00
Yuri Galperin Flux dendrites produced by avalanches in superconducting films 19.05.2011 14:00
Dr. Peter Wahl Quantum Point Contact Microscopy 18.05.2011 15:00
Michal Vlasák Search for Microscpoic Black Holes at LHC 13.05.2011 10:30
Jan Mašek Antiferromagnetické polovodiče I-Mn-V: nová rodina materiálů pro spintroniku 11.05.2011 15:00

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