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
Artem Ryabov Diffusion of a tagged particle in open single-file systems 21.10.2014 15:00
Miloš V. Lokajíček Elastický rozptyl protonů a platnost optického teorému v silných interakcích 16.10.2014 14:00
Jiří Chýla Jak byly objeveny kvarky 15.10.2014 15:00
Harald Oberhofer A theoretical description of water splitting on metal decorated oxide surfaces 14.10.2014 10:00
Richard Lednický Joint Institute for Nuclear Research in Dubna: past, presence and future 13.10.2014 14:00
Yasuo Koide Diamond Field Effect Transistors with high-k gate insulator 09.10.2014 10:00
Nikolaj Moll Molecular Geometry Determination by Atomic Force Microscopy 07.10.2014 10:00
Petr Ondrejkovič Dynamics of nanoscale polarization fluctuations in a SBN-61 single crystal 07.10.2014 10:00
Sebastian Loth Controlling magnetism in atomically engineered nanostructures 02.10.2014 10:00
Jörn Bonse Femtosecond laser-induced periodic surface structures 19.09.2014 15:00
Thomas Frederiksen Simulations of electron transport phenomena in single-molecule junctions 16.09.2014 10:00
Prof. Alok Singh Nucleation and growth of twins during fracture of a fine grained magnesium alloy 15.09.2014 10:00
E. Z. Kurmaev X-ray spectra and electronic structure of Fe and Cu superconducting pnictides 11.09.2014 14:00
Prof. Jordi Arbiol Exploring the optical properties of nanomaterials at sub-nanometer scale with a direct correlation to its structure at atomic scale 11.09.2014 11:00
Jiří J. Mareš The Concept of Temperature – Critical Analysis 10.09.2014 14:00
Ron Jansen Silicon spintronics 08.09.2014 10:00
Martin Veis Magneto-optical spectroscopy and ellipsometry of nanostructures 28.07.2014 10:00
M. I. Tsindlekht DC and AC Magnetic Properties of the Thin Walled Superconducting Niobium Cylinder 24.07.2014 14:00
Prof. Jeffrey McCord Magnetic materials as seen by magneto-optics 21.07.2014 10:00
Martin Eckstein Nonequilibrium control of the magnetic exchange interaction 17.07.2014 14:00
Prof. Robert L. Byer LASERs at Stanford: from the Laboratory to Commercial Products 08.07.2014 10:00
Dr. Nektarios Chr. Benekos Detection techniques and data monitoring on ATLAS experiment. 24.06.2014 14:30
Prof. Juris Purans Synchrotron radiation XAFS studies of local structure with femtometer accuracy 23.06.2014 10:00
Dr. Valentina Scuderi Hadron Therapy and Its Importance in Medicine 19.06.2014 14:00
Prof. Dr. Juan Carlos Cuevas Heat-dissipation in atomic-scale junctions 10.06.2014 10:00
Dr. Thibault Derrien Ultrashort laser processing of solids. Numerical investigation of sub-wavelength optical and thermal effects in nanomaterials 05.06.2014 16:00
Zdeněk Regner Prostorové soustavy minimálních ploch 04.06.2014 10:00
Igor Bieloshapka Kompozitní katalytické materiály pro zlepšení účinnosti palivového článku s kyselinou mravenčí 03.06.2014 13:00
Prof. Siegmund Greulich-Weber Photoelectrochemical Water Splitting 02.06.2014 10:00
Lucia Nasi Transmission electron microscopy study of semiconductor nanowires and nanostructured materials 28.05.2014 10:00

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