Fyzikální ústav Akademie věd ČR

Semináře

Charged domain walls in BaTiO3 single-crystals

Úterý, 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.

Více >>

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

Čtvrtek, 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.

Více >>

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

Pátek, 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.

Více >>

Manipulation of magnetization by spin-orbit torques

Pátek, 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.

Více >>

Minulé semináře
Viktor Holubec Theoretical description of non-equilibrium energy transformation processes on the level of molecular structures 26.11.2013 15:00
Jeongsu Lee Nodal ”ground states” and orbital textures in semiconductor quantum dots 26.11.2013 13:00
Alan Sneddon Manažerské výzvy a rizika během výstavby nejintenzivnějšího laseru světa 25.11.2013 11:30
Prof. Bernard Hehlen Peculiarity of the low frequency dynamics of ferroelectric relaxors 19.11.2013 10:00
Prof. Sean Li Self-assembly of CeO2 Nanocubes: New Approach for the Development of Resistive Random Access Memory Devices 15.11.2013 14:00
E. Mihóková, P. Novák Crystal field and magnetism with Wannier functions: rare-earth ions in garnets, manganites and cobaltates 14.11.2013 14:00
Jiří Chudoba Aktuální trendy ve zpracování dat - zpráva o konferencích CHEP 2013 a HEPIX 14.11.2013 14:00
Tadeusz Domański Superconducting fluctuations in the electron systems with real-space pairs 12.11.2013 15:00
Peter Moulton Ti:sapphire Lasers: Past, Present and Future 06.11.2013 15:00
Istvan Kezsmarki New optical phenomena in multiferroic materials 05.11.2013 15:00
Prof. Shigeki Tokita Development of high-power mid-infrared Er fiber lasers 04.11.2013 14:30
Prof. Junji Kawanaka Current status of TRAM laser and its application at ILE/Osaka 04.11.2013 14:00
Michael Prouza Temná hmota a temná energie v současné kosmologii 31.10.2013 14:00
D.S. Shapiro Dynamic regime of conduction in the Luttinger liquid with an impurity 29.10.2013 15:00
Vít Zajac Charge transport in THz regime: carrier localization vs. effective medium effects 24.10.2013 10:00
Karel Král Energy transfer between nanostructures 22.10.2013 15:00
Jiří Hlinka Soft modes of antiferroelectric lead zirconate 22.10.2013 10:00
Jan Fischer Výpočet vazbového parametru α_s z hadronového rozpadu leptonu τ 17.10.2013 14:00
Neha Topnani and Anna Zep Selected results from our partners in liquid crystal research 17.10.2013 10:00
Peter West Symmetries and their role in fundamental physics 15.10.2013 15:00
Mateusz Mrukiewicz Dual-frequency nematic liquid crystals 15.10.2013 10:00
Jiří Kvita Differential spectra for t-tbar events in the ATLAS experiment 10.10.2013 14:00
Jan Kuneš Off-diagonal order in materials close to spin-state transition 08.10.2013 15:00
Héctor Vázquez Electron transport in molecular systems 08.10.2013 10:00
Martin Schnabl Stringy and higher-spin activities in the theory department 03.10.2013 14:00
Vladislav Pokorný Spectral and transport properties of a superconducting quantum dot system 01.10.2013 15:00
Prof. Makoto Konagai Research and Development of Innovative Solar Cells – Establishing Global Research Centers 27.09.2013 10:00
Vladislav Pokorný Spectral and transport properties of a superconducting quantum dot system 26.09.2013 14:00
Isodiana Crupi Plasmonic metal nanoparticles for thin film solar cells 24.09.2013 10:00
Alexander Kupčo Novinky z konference EPS 2013 19.09.2013 14:00

Copyright © 2008-2014, Fyzikální ústav AV ČR, v. v. i.