STRONG CORR · Strong electronic correlations in low dimensional systems
FP6 — Marie Curie Actions (Human Resources and Mobility)
- Duration
- 2004-03-01 → 2005-02-28
- EU contribution
- €40,000
- Participants
- 1
- Scheme
- ERG
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Results in brief
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.
Data: CORDIS, © European Union
Project objective
The electronic properties of new materials such as the high-Tc superconductors, heavy fermions and layered organic superconductors are still poorly understood. The conventional theory of metals based on band structure calculations fails to reproduce many o f the observed properties. Latered molecular compounds such as the K-(BEDT-TTF)2x family of organic superconductors display metallic, superconducting and insulating phases, close to each other. One important issue is to understand the origin of the superco nductivity and its connection to the nearby antiferromagnetic phase. Quantum dots are other examples of low dimensional systems which display quantum many-body phenomena. We will explore the effect of electron correlations in these systems by combining ana lytical and numerical methods.
Original text from CORDIS.
Participants
- UNIVERSIDAD AUTONOMA DE MADRID · MADRIDCoordinatorSpain
Links
Data: CORDIS, © European Union