Final Activity Report Summary - STRONG CORR (Strong electronic correlations in low dimensional systems)
The main objective of the present project was to understand correlation effects in low dimensional systems.
Two different types of strongly correlated systems were analysed, namely layered organic materials and scanning tunnelling spectroscopy of Kondo impurities adsorbed on noble metal surfaces. Regarding the layered organic materials, we found that charge frustration, which was present in many quarter-filled systems, was able to stabilise a robust metallic state as a result of the quantum melting of the charge ordering. This state should have unconventional properties, which were under study by the time of the project completion, and was relevant to the poorly understood properties of the metallic state in these systems. Regarding Kondo impurities adsorbed in metals we found that the surface states of the metallic surface played a major role in the atom-surface interaction in comparison to the bulk states, thus explaining the observed lateral dependence of conductance amplitudes.
Two different types of strongly correlated systems were analysed, namely layered organic materials and scanning tunnelling spectroscopy of Kondo impurities adsorbed on noble metal surfaces. Regarding the layered organic materials, we found that charge frustration, which was present in many quarter-filled systems, was able to stabilise a robust metallic state as a result of the quantum melting of the charge ordering. This state should have unconventional properties, which were under study by the time of the project completion, and was relevant to the poorly understood properties of the metallic state in these systems. Regarding Kondo impurities adsorbed in metals we found that the surface states of the metallic surface played a major role in the atom-surface interaction in comparison to the bulk states, thus explaining the observed lateral dependence of conductance amplitudes.