Fyzikální ústav Akademie věd ČR

Semináře

Úterý, 04.10.2016 10:00

Jack Hellerstedt (Institute of Physics of the CAS, Czech Republic)

The past decade has borne witness to the rapid development of a new field of theoretical and experimental condensed matter physics commonly referred to as “topological insulators”. I will briefly discuss some of the concepts that motivate these so-called topological states of matter, before presenting some of our work on two of these bismuth based materials.

Úterý, 04.10.2016 14:00 - 15:00

Natalia Tomasovicova

Čtvrtek, 06.10.2016 14:00 - 15:00

Dr. Cyrille Marquet (Ecole Polytechnique, France)

Abstrakt:

We study the production of forward dijets in dilute-dense hadronic collisions, such as proton-lead collisions at the LHC. These final-state configurations, with both jets produced in the forward direction, probe the gluon density of the lead nucleus at very small longitudinal momentum fractions, and may therefore be sensitive to the non-linear "saturation" regime of QCD.

Úterý, 11.10.2016 10:00

Martin Setvin (TU Wien, Wiedner Hauptstrasse 8-10/134, 1040 Austria)

TiO2 is a prototypical metal oxide used in many applications such as photocatalysis, photoelectrochemical solar cells, and transparent conducting oxides. Two forms of TiO2 are used industrially – rutile and anatase. Electron transfer between substrate and adsorbed species is a key step in heterogeneous catalysis and photocatalysis. I will focus on activating adsorbed O2 molecules via an electron transfer from the anatase and rutile TiO2 substrates. O2 molecules are inert, mainly due to the triplet spin configuration.

Úterý, 18.10.2016 10:00 - 11:00

Thomas Michely (II. Physikalisches Institut, Universität zu Köln, Germany)

2D-layers, like graphene or a monolayer of hexagonal boron nitride (h-BN), enable the creation of new materials, unforeseen reaction pathways or striking confinement effects. Three examples for this statement are given. (i) Room temperature deposition on a 2D-layer moiré with an Ir(111) substrate results in the formation of a regular array of clusters with a narrow size distribution and high thermal stability. Such arrays may be of great use for applications in nanocatalysis and nanomagentism. Here we will specifically discuss the formation of a novel carbon cluster / graphene compound.

Čtvrtek, 20.10.2016 14:00 - 15:00

Dr. Roman Pasechnik (Lund University, Švédsko)

Abstrakt:

Production of heavy photons (Drell-Yan), gauge bosons, Higgs bosons, heavy flavors, which is treated within the QCD parton model as a result of hard parton-parton collision, can be considered as a bremsstrahlung process in the target rest frame. In my talk, I discuss the basic features of the diffractive channels of these processes in the framework of color dipole approach. The main observation is a dramatic breakdown of diffractive QCD factorisation due to the interplay between soft and hard interactions, which dominates these processes.

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