We deposited amorphous Bi films with a thickness between 3 and 6.5 nm at 4.2 K on top of previously deposited Co clusters having a mean size of ∼4.5 nm. The Co cluster layers thickness was between 2.3 and 5 nm. In-situ electrical transport measurements were performed between 2 and 100 K....

We have measured the Hall conductivity and the magnetoconductivity on the metallic side of the metal insulator transition (MIT) in a three dimensional (3D) percolating system, namely the metal rare gas mixture Sn:Ar. The Hall constant RH diverges as RH ∝ (ν − νc)−g with the critical...