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Nonmagnetic disorder is shown to quench the screening of magnetic moments inmetals, the Kondo effect. The probability that a magnetic moment remains freedown to zero temperature is found to increase with disorder strength.Experimental consequences for disordered metals are studied. In particular, itis shown that the presence of magnetic impurities with a small Kondotemperature enhances the electron's dephasing rate at low temperatures incomparison to the clean metal case. It is furthermore proven that the width ofthe distribution of Kondo temperatures remains finite in the thermodynamic(infinite volume) limit due to wave function correlations within an energyinterval of order $1/\tau$, where $\tau$ is the elastic scattering time. Whentime-reversal symmetry is broken either by applying a magnetic field or byincreasing the concentration of magnetic impurities, the distribution of Kondotemperatures becomes narrower.Comment: 17 pages, 7 figures, new results on Kondo effect in quasi-1D wires  added, 6 Refs. adde

Disorder-quenched Kondo effect in mesoscopic electronic systems