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. pp. 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 |
| Article Subtype: | Research Article |
| 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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