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
Prof. Sergei V. Bulanov Relativistic Laboratory Astrophysics with Extreme Power Lasers 05.09.2012 15:00
Remarks from the Joint International Symposium 11th ISFD & 11th RCBJSF 04.09.2012 10:00
A. G. Nikitin Supersymmetric and superintegrable models of quantum mechanics 27.08.2012 15:00
Lalit Mohan Kukreja Laser Rapid Manufacturing and Peening: Recent Developments 01.08.2012 14:00
Hiromitsu Kiriyama High power laser developments at JAEA 24.07.2012 14:00
Petr Hořava Gravity with Anisotropic Scaling and the Multicritical Universe 17.07.2012 15:00
Takeshi Higashiguchi Fundamental property of 6.X-nm EUV emission for the next generation lithography 16.07.2012 10:30
Josef Kudrnovský* Galvanomagnetic phenomena in random alloys: the first-principles approach 26.06.2012 15:00
Zsolt Majzik, MSc. Relation between the apparent barrier height, the chemical force and the local contact potential difference in atomic scale 26.06.2012 10:30
Mgr. Martin Ondráček, Ph.D. AFM on a Hydrogenated Si 7x7 Surface: exploring different interaction regimes 26.06.2012 10:00
Petr Závada Deep inelastic scattering kinematics in covariant approximation 22.06.2012 13:30
Takatoshi Yamada Roll-to-roll deposition of graphene film by microwave plasma CVD 22.06.2012 10:30
Alastair B. McLean Assembling and Blocking Epitaxial Organic Layers on Si Surfaces 21.06.2012 15:00
G. Korn, P. Bakule, P. Korouš, V. Růžička Laser centre ELI Beamlines 20.06.2012 15:00
A. Kalvová Transient electron currents through a molecular bridge in response to short switching sequences 19.06.2012 15:00
Jaroslav Zálešák Neutrino experiment NOVA 15.06.2012 13:30
Alexander V. Boris Nanoscale layering of antiferromagnetic and superconducting phases in Rb2Fe4Se5 12.06.2012 10:00
Evan J. Spadafora Investigations of model organic materials and photovoltaic devices using noncontact atomic force microscopy and Kelvin probe force microscopy 12.06.2012 10:00
Bedřich Velický On The Weak Quantum Mechanical Measurements 05.06.2012 15:00
Jiří Pokorný Electrodynamic activity of cells and its changes during the malign process 05.06.2012 10:00
Miroslav Myška Study of multiple parton collisions in ATLAS experiment 01.06.2012 13:30
Vít Novák Antiferromagnetic semiconductors I-Mn-V: epitaxial growth and first experiments 30.05.2012 15:00
Jindřich Kolorenč Anderson impurity model in an external magnetic field 29.05.2012 15:00
František Máca The electronic and magnetic structure of Mn doped semiconductors and semimetals 22.05.2012 15:00
Gustau Catalan "Flexoelectricity: What is it, and why does it matter" 18.05.2012 10:00
Victor V. Kukhtin JINR participation in ATLAS upgrade 17.05.2012 15:00
Wilfried Schranz Dynamic elasticity of materials 15.05.2012 15:00
Prof. Hamid Oughaddou Growth of Silicene 14.05.2012 15:00
Ing. Štěpán Stehlík, Ph.D. Electrical potentials of nanodiamonds with different surface terminations evaluated by Kelvin probe force microscopy 09.05.2012 09:30
Carlito S. Ponseca Charge carrier dynamics in polymer solar cell materials probed by time resolved terahertz spectroscopy 03.05.2012 10:00

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