Title

Critical Metal Phase At The Anderson Metal-Insulator Transition With Kondo Impurities

Abstract

It is well known that magnetic impurities can change the symmetry class of disordered metallic systems by breaking spin and time-reversal symmetry. At low temperature, these symmetries can be restored by Kondo screening. It is also known that at the Anderson metal-insulator transition, wave functions develop multifractal fluctuations with power-law correlations. Here, we consider the interplay of these two effects. We show that multifractal correlations open local pseudogaps at the Fermi energy at some random positions in space. When dilute magnetic impurities are at these locations, Kondo screening is strongly suppressed. When the exchange coupling J is smaller than a certain value J*, the metal-insulator transition point extends to a critical region in the disorder strength parameter and to a band of critical states. © 2009 The American Physical Society.

Publication Date

9-14-2009

Publication Title

Physical Review Letters

Volume

103

Issue

12

Number of Pages

-

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1103/PhysRevLett.103.126401

Socpus ID

70349116530 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/70349116530

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