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
Gregorio Bernardi Recent Results from the Tevatron 23.04.2014 10:00
J. Enrique Ortega Electronic states at donor-acceptor/ metal interfaces probed with electron spectroscopies: NEXAFS, XPS and UPS 22.04.2014 10:00
Petr Trávníček Highest energy cosmic rays at observatories CTA and Pierre Auger 16.04.2014 15:00
Dr. Otakar Frank Raman spectroscopy of graphene – basic characterization and beyond 08.04.2014 10:00
Pavel Cejnar Chaos in collective nuclear dynamics 03.04.2014 14:00
Vítězslav Jarý Thermally induced ionization and quenching processes in novel oxide and sulfide scintillation materials 01.04.2014 13:00
Dr. M. Gary Higher Spin Lifshitz Holography 28.03.2014 15:00
Karel Netočný Geometric and kinetic aspects of nonequilibrium steady states 25.03.2014 15:00
Josef Mysliveček Thin films of ceria for model catalytic experiments 25.03.2014 10:00
Dr. Ryo Yasuhara Transparent magneto-optic TGG ceramics for the high energy and high power laser applications 24.03.2014 11:00
Oleg Lunov Advanced Physical Methods in Cell Biology and Nanomedicine 19.03.2014 15:00
Neda Neykova ZnO nanocolumns arrays for thin film silicon solar cells 18.03.2014 13:00
Ing. Jozef Vincenc Oboňa, PhD. Lased-induced Periodic Surface Structures (LIPSSs) Initiation and “growth” 18.03.2014 13:00
Sergey Varlamov LASER CRYSTALLISED SILICON THIN FILMS AND SOLAR CELLS ON GLASS: SIGNIFICANC OF THE INTERFACE 18.03.2014 10:00
Aurélien Manchon / Dominique Givord Spin-Orbit Caloritronics / Electric Field Effects on Magnetism in Metals 14.03.2014 10:00
Maria Valentyuk Microscopic picture of magnetic frustration effects and related phenomena in novel materials 12.03.2014 15:00
Kristin Poduska The role of electrochemistry in semiconductor growth and degradation 06.03.2014 10:00
Karel Carva Calculating ultrafast magnetization dynamics 04.03.2014 15:00
Katharina J. Franke Magnetic properties of single molecules and metal-organic networks on surfaces 04.03.2014 13:00
Jiří Červenka Chemical sensing by graphene field effect transistors 04.03.2014 10:00
Marek Taševský FCC – Future Circular Collider Study - information from the Kick-off workshop 27.02.2014 14:00
František Máca The influence of adsorbates on the magnetic structure of the Fe/Ir(001) surface 25.02.2014 15:00
Prof. Shuji Sakabe Research activities of Laboratory for Laser-Matter Science, Institute for Chemical Research 21.02.2014 11:50
Prof. Lalit M. Kukreja Laser Surface Modifications and Additive Manufacturing: Recent Developments at RRCAT 21.02.2014 11:00
Dr. Al Erlandson Energetics Modeling and Slit Filters for Diode- Pumped Solid-State Lasers 21.02.2014 09:50
Dr. Hiromitsu Kiriyama Progress towards ultra-high intensity laser 21.02.2014 09:00
Gunther Eggeler On the use of advanced transmission electron microscopy for characterizing elementary transformation and deformation processes in shape memory alloys and high temperature materials 18.02.2014 14:00
Robert Král Study of crystal growth by directional crystallization methods 11.02.2014 13:00
Lukáš Ondič Silicon nanocrystals, photonic structures and optical gain 06.02.2014 15:00
Jiří Chudoba, Oldřich Kepka ATLAS experiment data processing at the Goliáš computer farm 06.02.2014 14:00

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