Static and dynamical properties of a single impurity in a strongly correlated host

We study, using numerical exact diagonalisation, some static and dynamical properties of a single impurity substituted into a one-dimensional repulsiv e Hubbard chain. A systematic scan of the parameter-space reveals a rich ma gnetic phase diagram. Interactions on the lattice stabilize the local momen t phase of the impurity. A scalar impurity is seen to induce local moments on the neighbouring sites near Half Filling. Static spin and charge correla tion functions reflect a non-Fermi liquid character of the ground state in the presence of a scalar impurity.