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Study of strongly correlated electrons in nanoscopic and bulk forms: some recent results

G Alvarez1, K A Al-Hassanieh2,3,4, F Popescu5, C Şen4, A Moreo2,3 and E Dagotto2,3

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Recent progress in the numerical study of various strongly correlated electronic systems is reviewed. The study of transport in single molecule conductors and quantum dots is addressed with a recently proposed adaptive time-dependent density-matrix-renormalization group (DMRG). Experiments involving non-local spin control and their numerical simulation are also discussed. A section is devoted to recent efforts in the study of spin-fermion models for colossal magnetoresistive manganites, where we present insights on the effect of disorder and electron–phonon coupling. Finally, using a dynamical mean field approach, we review calculations in the area of diluted magnetic semiconductors that provides guidelines on how the Curie temperature could be increased in these itinerant ferromagnetic systems.


PACS

71.27.+a Strongly correlated electron systems; heavy fermions

73.63.Kv Quantum dots

75.47.Gk Colossal magnetoresistance

75.47.Lx Manganites

75.50.Pp Magnetic semiconductors

Subjects

Condensed matter: electrical, magnetic and optical

Semiconductors

Nanoscale science and low-D systems

Dates

Issue 12 (28 March 2007)

Received 15 August 2006, in final form 22 August 2006

Published 6 March 2007



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