Session Q10: Invited Session: Rare Fluctuation Effects in Strongly Disordered Systems
11:15 AM–2:15 PM, Wednesday, February 29, 2012
Room: 210A
Sponsoring Units:
DCMP DCOMP
Chair: Susan Coppersmith, University of Wisconsin
Abstract ID: BAPS.2012.MAR.Q10.2
Abstract: Q10.00002 : Electronic Griffiths Phases and Quantum Criticality at Disordered Mott Transitions
11:51 AM–12:27 PM
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Abstract 
Author:
Vladimir Dobrosavljevic
(Director, Condensed Matter Science - Theory, NHMFL Florida State University)
The effects of disorder are investigated in strongly correlated electronic systems near the Mott metal-insulator transition. Correlation effects are found\footnote{E. C. Andrade, E. Miranda, and V. Dobrosavljevic, Phys. Rev. Lett., \textbf{102}, 206403 (2009).} to lead to strong disorder screening, a mechanism restricted to low-lying electronic states, very similar to what is observed in underdoped cuprates. These results suggest, however, that this effect is not specific to disordered d-wave superconductors, but is a generic feature of all disordered Mott systems. In addition, the resulting spatial inhomogeneity rapidly increases\footnote{E. C. Andrade, E. Miranda, and V. Dobrosavljevic, Phys. Rev. Lett., \textbf{104} (23), 236401 (2010).} as the Mott insulator is approached at fixed disorder strength. This behavior, which can be described as an Electronic Griffiths Phase, displays all the features expected for disorder-dominated Infinite-Randomness Fixed Point scenario of quantum criticality.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2012.MAR.Q10.2