Události

The red-light emitting phosphors get more and more attention in the recent years due to various applications, one of the most important of which is related to the solid state lighting and white light emitting diodes (LEDs). The currently used white LEDs suffer from the lack of the red component, which results in the high color correlated temperature (CCT) and low color rendering index (CRI). The phosphors based on the red emission of the Mn4+ ions are excellent candidates for improvement of the white LEDs characteristics. The advantage of these phosphors over those based on the Eu3+ and Sm3+...

Talentová akademie 2018 navazuje na loňský úspěšný první ročník a opět přináší možnost 12 studentům navštívit dvě špičková laserová centra v České republice – ELI Beamlines a HiLASE. Studenti se dostanou do veřejnosti nepřístupných laboratoří a experimentálních hal. V rámci specializovaných rolí pak budou během tří dnů pracovat na vědeckém projektu, jehož téma vychází z aktuálních otázek laserové fyziky a optiky. K řešení účastníci Talentové akademie využijí zázemí moderních laboratoří laserových center pod vedením vědeckých pracovníků.

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Abstract: An extended atomistic spin model allowing for studies of the finite temperature magnetic properties of alloys is proposed. The model is obtained by extending the Heisenberg Hamiltonian via a parameterization from a first principles basis, interpolating from both the low temperature ferromagnetic and the high temperature paramagnetic reference states. This allows us to treat magnetic systems with varying degree of itinerant character within the model. Satisfactory agreement with both previous theoretical studies and experiments are obtained in terms of Curie...

The modern version of the KKR (Korringa–Kohn–Rostoker) method represents the electronicstructure of a system directly and efficiently in terms of its single-particle Green's function. Direct access to the Green function results in several appealing features. In particular the description of the electronic correlations, disorder and electronic spectroscopies for the nanosystems and surfaces has been developed in the recent years. In the first part of my talk I will review basic ideas of the multiple scattering KKR formalism. Second part will be devoted to the Angle-resolved photoemission...