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Metal-insulator transition induced by random dipoles

  Articoli su Riviste JCR/ISI  (anno 2013)

Autori:  Larcher M., Menotti C., Tanatar B., Vignolo P

Affiliazione Autori:  INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento, 38123 Povo, Italy Department of Physics, Bilkent University, Bilkent, 06800 Ankara, Turkey Université de Nice - Sophia Antipolis, Institut non Linéaire de Nice, CNRS, 1361 route des Lucioles, 06560 Valbonne, France

Riassunto:  We study the localization properties of a test dipole feeling the disordered potential induced by dipolar impurities trapped at random positions in an optical lattice. This random potential is marked by correlations which are a convolution of short-range and long-range ones. We show that when short-range correlations are dominant, extended states can appear in the spectrum. Introducing long-range correlations, the extended states, if any, are wiped out and localization is restored over the whole spectrum. Moreover, long-range correlations can either increase or decrease the localization length at the center of the band, which indicates a richer behavior than previously predicted.

Rivista/Giornale:  PHYSICAL REVIEW A
Volume n.:  88 (1)      Pagine da: 013632  a: 013632
Ulteriori informazioni:  This work was supported by Grants No. CNRS-24543 and No. TUBITAK-210T050, by the LIA FSQL, by ERC through the QGBE grant, and by Provincia Autonoma di Trento. We are grateful to Franco Dalfovo, Iacopo Carusotto, Jean-Francois Schaff, and Luca Tessieri for useful discussions.
DOI: 10.1103/PhysRevA.88.013632

*Impact Factor della Rivista: (2013) 2.991   *Citazioni: 1
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  19/05/2019

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