Fyzikální ústav Akademie věd ČR

Seminars

Charged domain walls in BaTiO3 single-crystals

Tue, 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

Thu, 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

Fri, 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

Fri, 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
B. Rus, K. Rohlena Major thematic physics projects in the ELI-Beamlines laser facility: ultra-intense sources of radiation and accelerated particles, exotic physics 23.03.2011 15:00
Mojmír Šob Studium struktury a magnetismu hranic zrn v železe a v niklu z prvních principů 22.03.2011 15:00
Andreas Heinrich Probing the energetics and dynamics of individual atomic spins on surfaces 21.03.2011 15:00
Pavel Jež Search for NMSSM in the Higgs sector with the ATLAS detector 18.03.2011 13:30
Milan Krtička The origin of heavy elements in the Universe 17.03.2011 15:00
Karel Netočný Some aspects of non-equilibrium thermodynamics for small stochastic systems - part I 15.03.2011 15:00
Ali Sadeghi Minima Hopping Method: Structure prediction of nano-systems. Multiscale simulation of Kelvin probe force microscopy. 14.03.2011 14:00
Axel Hoffmann Pure Spin Currents: Discharging Spintronics 07.03.2011 15:00
Azamat Elmurodov Phase-slip phenomena in NbN superconducting nanowires with leads 24.02.2011 14:00
Antonín Fejfar Microscopic study of silicon thin films 23.02.2011 15:00
Balazs Ujfalussy Interactions between magnetic impurities on surfaces of noble metals and alloys 22.02.2011 15:00
Jan Hladký Physics at IHEP Serpukhov 1970 - 1990 (BIS-1 and BIS-2 experiments or What we also did since our beginnings) 17.02.2011 15:00
Bohdan Hejna Basics Ideas of Information Thermodynamics 16.02.2011 10:00
Pavel Středa Anomalous Hall conductivity: local orbitals approach 15.02.2011 15:00
Michal Svatoš Measurement of differential cross section of the processes gamma + b(c) + X at the ATLAS experiment 11.02.2011 13:30
Leonid Glebov Laser beam control and fine spectral filtering by volume Bragg gratings in PTR glass 10.02.2011 10:00
P. Wissgott Analysis of thermoelectric materials with LDA+DMFT 08.02.2011 15:00
Prof. Jean-Philippe Ansermet High Field Dynamic Nuclear Polarization using Gyrotrons 07.02.2011 10:00
Michal Marčišovský Muons and the angular correllations of B hadrons in the ATLAS detector 28.01.2011 13:30
Oldřich Kepka Spectra of charged particles in minimum bias interactions measured by the ATLAS detector 21.01.2011 13:30
Valentina Domenici The role of NMR to study partially ordered systems: perspectives and few examples 20.01.2011 10:00
Hyung Taek Kim Development of PW laser system at APRI and its applications 10.01.2011 14:00
Karel Výborný, Sigurdur I. Erlingsson Non-local signal on Ag/Py spin-valve devices: beyond Hanle effect 07.01.2011 11:00
Miloš Jirsa Energy accumulation and high-T_c superconductors 15.12.2010 15:00
Dr. András Berkó Tailored formation of composite nanoparticles on TiO2(110) surfaces 15.12.2010 15:00
D. Nohavica, E. Hulicius Nanotechnology Safety - rizika nanomateriálů a nanotechnologií 15.12.2010 10:30
RNDr. Barbara Zitová, Ph.D. The role of computer image processing in restauration of art works 14.12.2010 15:00
Martin Švec Graphene moires on platinum & Probing the paths towards RNA synthesis 14.12.2010 15:00
Anna Kauch Mott-insulator and superfluid phases of correlated bosons -- the bosonic dynamical mean-field approach with the strong coupling impurity solver 07.12.2010 15:00
Karel Král Long-time Photoluminescence Kinetics in Quantum Dot Samples 30.11.2010 15:00

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