WEAK-LOCALIZATION, UNIVERSAL CONDUCTANCE FLUCTUATIONS, AND 1 F NOISE IN AG/

We have measured the magnetoresistance and the magnetic-field dependen ce of the 1/f noise in thin Ag films over the temperature range 1-25 K . Fits of the data to the theories of weak localization and universal conductance fluctuations, respectively, yield two independent estimate s of the phase-breaking length L(phi). These two estimates of L(phi) a re in general agreement in overall magnitude and temperature dependenc e, but there is a noticeable discrepancy at 1.0 and 4.4 K. We believe that this discrepancy is significant, and may point to an inadequate t reatment of electron-electron interactions in the present theories.