Quantum Critical Transport near the Mott Transition

Terletska, H and Vucicevic, J and Tanaskovic, Darko and Dobrosavljevic, V (2011) Quantum Critical Transport near the Mott Transition. Physical Review Letters, 107 (2). 026401. ISSN 0031-9007 (FP7- 261323)

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Abstract

We perform a systematic study of incoherent transport in the high temperature crossover region of the half-filled one-band Hubbard model. We demonstrate that the family of resistivity curves displays characteristic quantum critical scaling of the form �(T; �U) = �c(T)f(T=To(�U)), with To(�U) � j�Ujz�, and �c(T) � T. The corresponding �-function displays a “strong coupling” form � � ln(�c=�), reflecting the peculiar mirror symmetry of the scaling curves. This behavior, which is surprisingly similar to some experimental findings, indicates that Mott quantum criticality may be acting as the fundamental mechanism behind the unusual transport phenomena in many systems near the metal-insulator transition.

Item Type:	Article
FP7 Grant Agreement Number:	261323
FrameWork Programmes:	SP4-Capacities
Scientific Areas:	Research Infrastructures
Last Modified:	08 Aug 2012 10:47
Access rights:	Open access
URI:	http://eprints.kobson.nb.rs/id/eprint/11

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