Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published November 1, 2005 | public
Journal Article Open

Macroscopic coherence effects in a mesoscopic system: Weak localization of thin silver films


We present an advanced undergraduate experiment on weak localization in thin silver films with a thickness between 60-200 angstrom, a mesoscopic length scale. At low temperatures, the inelastic dephasing length for electrons exceeds the film thickness, and the film becomes quasi-two-dimensional. In this limit, theory predicts corrections to the Drude conductivity due to the coherent interference between the wave functions of the conducting electrons, a macroscopically observable effect known as weak localization. This correction can be destroyed by the application of a magnetic field, and the resulting magnetoresistance curve provides information about electron transport in the film.

Additional Information

©2005 American Association of Physics Teachers. Received: 9 March 2005; accepted: 29 July 2005. This work was supported by the National Science Foundation under Grant No. DUE-0088658.


Files (156.2 kB)
Name Size Download all
156.2 kB Preview Download

Additional details

August 22, 2023
October 16, 2023