Fyzikální ústav Akademie věd ČR

Seminars

Chemical sensing by graphene field effect transistors

Tuesday, 04.03.2014 10:00 - 11:00

Jiří Červenka (School of Physics, The University of Melbourne)

Graphene's two dimensional nature, highly sensitive unique electrical properties and low intrinsic noise characteristics make it a prime candidate for the creation of a new generation of molecular sensors. Despite of high sensitivity of graphene sensors, their selectivity remains a major problem for their practical use. In this talk I present different strategies for selective sensing using graphene-based sensors.

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Magnetic properties of single molecules and metal-organic networks on surfaces

Tuesday, 04.03.2014 13:00 - 14:00

Katharina J. Franke (Freie Universität Berlin)

The magnetic properties of atoms and molecules on a surface are significantly affected by details in the atomic-scale surrounding. Manipulation of this surrounding provides the possibility to tune the electronic and magnetic functionality of surfaces on a nanometer scale. Using scanning tunnelling spectroscopy (STS), we show that the lifetime of excited spin states in the paramagnetic Fe-Octaethylporphyrin-Chloride (FeOEP-Cl) is orders of magnitude longer when the molecule is adsorbed on a superconductor as compared to a normal metal substrate.

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Calculating ultrafast magnetization dynamics

Tuesday, 04.03.2014 15:00

Karel Carva (Oddělení teoretické fyziky, katedry fyziky kondenzovaných látek, MFF UK)

Abstract: In recent years it has been demonstrated that magnetization can be changed without applying an external magnetic field in extremely short timescales of the order of hundreds of femtoseconds [1]. We have studied the effect by means of ab initio calculations for three ferromagnetic metals Fe, Co and Ni [2] considering the Elliott-Yafet electron-phonon spin-flip (SF) scattering [3] which has been suggested to be the dominant microscopic mechanism.

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The role of electrochemistry in semiconductor growth and degradation

Thursday, 06.03.2014 10:00 - 11:00

Kristin Poduska (Department of Physics and Physical Oceanography Memorial University of Newfoundland, Canada)

Electrochemical methods are widely applied to metal film deposition in industrial and high-tech settings, but the market share for semiconductor films produced using electrochemistry is dramatically less. At the same time, a large fraction of semiconductor-based devices rely on applied voltages for their operation, which means that electrochemical processes could occur in these devices wherever there exists an interface between an electron conductor (such as a semiconductor) and an ion conductor (such as water).

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Past seminars
E. Hulicius, J.J. Mareš, F. Kadlec Transport properties of GaN doped with Fe 19.10.2011 15:00
Pavel Augustinský Stability of Fermi liquid with respect to dynamical fluctuations in strongly correlated electron systems 18.10.2011 15:00
Rüdiger-A. Eichel Interplay between defect structure and piezoelectric properties of Pb[Zr,Ti]O3 and ‘lead-free’ alternative compounds 18.10.2011 10:00
Miloš V. Lokajíček Quantum physics without observers and paradoxes? 13.10.2011 15:00
Christian Teichert AFM based characterization of inorganic and organic semiconductor nanostructures 13.10.2011 14:00
Jean Paul Perin The extreme cold in the service of science 12.10.2011 15:00
Nickolay Gennadievich Galkin Structure, luminescence and thermoelectric properties of silicon-silicide nanoheterostructures with buried nanocrystals 12.10.2011 13:45
Konstantin Nickolaievich Galkin Thermoelectrical properties of silicon double heterostructures with buried magnesium silicide two-dimensional structures 12.10.2011 13:00
John E. Pask Enriched and high-order finite elements for large, accurate ab initio electronic structure calculations 04.10.2011 15:00
Dr. Baerbel Rethfeld Electronic processes occurring in solids irradiated by ultra-short XUV/Vis laser pulses: theory and computer simulations 04.10.2011 13:00
László Szunyogh Multiscale study of magnetism at the nanoscale: highlighting spin-orbit induced phenomena 30.09.2011 10:00
prof. Andreas Pöppl Cw and Pulsed ESR Spectroscopy of Paramagnetic Centers in Porous Materials 27.09.2011 14:30
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
Jan Hladký Our emigrants from the department of high energy physics of the Institute of Physics of the CSAS after 1968 23.06.2011 15:00
Elizabeth John Phonon modes and ferroelectric domains in PbTiO3 thin films 23.06.2011 10:00
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
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: New trends in development 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
Petr Gallus, Martin Zeman Seminar from the series "Physics at ATLAS Experiment" 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

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