Infrared conductivity of ultrathin Pb films: effects of granularity vs. localization
Collaborators:
Outline of the talk:
Theorist’s sketch of what was done experimentally
PPT Slide
The validity of Drude formula in thickest films
What causes the conductivity of thinner films to go down at low frequencies?
Weak localization effects in the ac-conductance
L? and the effective dimensionality of the sample
Are our results consistent with (weak) localization theory alone?
Why disagreement?
Pb films are granular at small length scales.
Maybe localization explanation of our data can be saved by modifying it for inhomogeneous (granular) materials?
Purely classical effects of granularity
Theoretical approaches to ac-conductance in granular systems
Experimental data are in accord with percolation picture
Check of percolation scaling for the DC data
Data collapse for different runs of the experiment
Conclusions:
Email: maslov@bnl.gov
Home Page: http://cmth.phy.bnl.gov/~maslov