1. The Metal-Insulator Transition

4. 3 dimensional M-I transition

5. Tunneling Density of States
Tunneling into amorphous Nb(1-x)Si(x)
With increasing x, system goes through the metal-insulator transition

6. Conductivity and Density of States

7. H-field dependence near M-I transition (amorphous Gd-Si)

9. Gd-Si Alloys (amorphous)

10. Tunneling Density of States

11. Composite tunneling spectra

12. Conductivity and Tunneling Zero Bias Conductance

13. Superconducting-Insulating Transition
Superconducting wave function
y=y0eif yo = amplitude
f= phase