Temperature dependent weak localization is measured in metallic nanowires in a previously unexplored size regime down to width . The dephasing time, , shows a low temperature dependence close to quasi-1D theoretical expectations ( ) in the narrowest wires, but exhibits a relative saturation as for wide samples of the same material, as observed previously. As only sample geometry is varied to exhibit both suppression and divergence of , this finding provides a new constraint on models of dephasing phenomena.
- Received 19 June 2000
- Published in the issue dated 26 February 2001
© 2001 The American Physical Society