Abstract
We report on the emergence of an electronic Griffiths phase in the doped semiconductor , predicted for disordered insulators with random localized moments in the vicinity of a metal-insulator transition. Magnetic, transport, and thermodynamic measurements of single crystals show signatures of disorder-induced non-Fermi liquid behavior and a Wilson ratio expected for strong electronic correlations. The electronic Griffiths phase states are found on the metallic boundary between the insulating state () and a long-range albeit weak magnetic order ().
- Received 10 September 2012
DOI:https://doi.org/10.1103/PhysRevLett.109.256401
© 2012 American Physical Society