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Superconductor–Mott-insulator transition in Bose systems with finite-range interactions

Bruder, C. and Fazio, R. and SCHÖN, G.. (1993) Superconductor–Mott-insulator transition in Bose systems with finite-range interactions. Physical Review B, Vol. 47, H. 1. S. 342-347.

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Official URL: http://edoc.unibas.ch/dok/A5252868

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Abstract

We study the superconductor-insulator transition of Bose-Hubbard models with finite-range interactions. Commensurability of the charge distribution with the underlying lattice leads to a richly structured phase diagram. In addition to the lobes of insulating phase characterized by integer fillings, we find-for finite-range interactions-lobes with rational filling factors. At low temperatures we can investigate the phase transition by mapping the model onto a XXZ spin-1/2 Heisenberg model.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik (Bruder)
UniBasel Contributors:Bruder, Christoph
Item Type:Article, refereed
Bibsysno:Link to catalogue
Publisher:American Institute of Physics
ISSN:0163-1829
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:22 Mar 2012 14:25
Deposited On:22 Mar 2012 13:48

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