Title

Nonperturbative Scaling Theory Of Free Magnetic Moment Phases In Disordered Metals

Abstract

The crossover between a free magnetic moment phase and a Kondo phase in low-dimensional disordered metals with dilute magnetic impurities is studied. We perform a finite-size scaling analysis of the distribution of the Kondo temperature obtained from a numerical renormalization group calculation of the local magnetic susceptibility for a fixed disorder realization and from the solution of the self-consistent Nagaoka-Suhl equation. We find a sizable fraction of free (unscreened) magnetic moments when the exchange coupling falls below a critical value Jc. Between the free moment phase due to Anderson localization and the Kondo-screened phase we find a phase where free moments occur due to the appearance of random local pseudogaps at the Fermi energy whose width and power scale with the elastic scattering rate 1/τ. © 2007 The American Physical Society.

Publication Date

12-11-2007

Publication Title

Physical Review Letters

Volume

99

Issue

24

Number of Pages

-

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1103/PhysRevLett.99.247202

Socpus ID

37149015431 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/37149015431

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