Spin Liquid Behavior in Electronic Griffiths Phases
  We examine the interplay of the Kondo effect and the RKKY interactions in electronic Griffiths phases using extended dynamical mean-field theory methods. We find that sub-Ohmic dissipation is generated for sufficiently strong disorder, leading to suppression of Kondo screening on a finite fraction of spins, and giving rise to universal spin-liquid behavior. 
D. Tanaskovic, V. Dobrosavljevic, E. Miranda