Electronic structure and parity effects in correlated nanosystems

Electronic Structure and Parity Effects in Correlated Nanosystems

We discuss the spectral, transport and magnetic properties of quantum nanowires composed of N 6 13 atoms and containing either even or odd numbers of valence electrons. In our approach we combine Exact Diagonalization and Ab Initio calculations (EDABI method). The analysis is performed as a function of the interatomic distance. The momentum distribution differs drastically for those obtained fo...

the effects of changing roughness on the flow structure in the bends

flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...

Electronic Structure of Highly Correlated Structures

Threedifferent butrelated problemsam discussed inthiscontribution, allrelated to theso.called Anderson, Hubbard,and t-J Hamiltonians -theprototype Hamiltonians forsystemswithhighlycorrelated lectrons: (1)The relationship -basedon thewell known canonical (Schrieffer-Wolff) transformation --.betweentheAndersonmodel(inthe small.hybridization and large.Coulomb-interaction regime) and the local mome...

Correlated electronic structure of LaO1-xFxFeAs.

We compute the electronic structure, momentum resolved spectral function and optical conductivity of the new superconductor LaO1-xFxFeAs within the combination of the density functional theory and dynamical mean field theory. We find that the compound in the normal state is a strongly correlated metal and the parent compound is a bad metal at the verge of the metal insulator transition. We argu...

A parity function for studying the molecular electronic structure