Fyzikální ústav Akademie věd ČR

Abstract:
There are many important features which distinguish magnetic overlayers from conventional magnetic materials. The reduced coordination on the surface induces geometry as well as chemical binding change, the substrate can strongly modify the magnetic state and properties of the overlayer system. Particularly suitable systems for detailed investigation are Fe overlayers on Ir(001) and Rh(001) surfaces.
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Ad hoc workshops are small two days workshops organized by authors of the crystallographic software Jana2006. The topics and dates are selected by participants. Topics of the Third Workshop: (INT2) Introduction to modulated structures, solution of simple 4d structures; (CHF) Application of charge flipping to 3d and modulated structures; (TW) Twins and multiphases of 3d and modulated structures; (COMM) Commensurate structures. Registration is open - please send your request to dusekfzu [dot] cz.

Semiclassical Monte Carlo methods have been widely used for carrier transport simulations in microelectronic devices. In the Monte Carlo device simulations the charge carriers are replaced by particles whose semiclassical dynamics is determined by the band structure of the semiconductor. Such an approach is justified for describing the transport at the length scales of realistic devices, where the quantum interference effects are less important. (více ...)

We investigate the effects of phonon scattering on the electronic current noise through nanojunctions using the nonequilibrium Green's functions formalism extended to include the counting field. In the case of weak electron-phonon coupling and a single broad electronic level, we derive an analytic expression for the current noise at arbitrary temperature and identify physically distinct contributions based on their voltage dependence. (více ...)