期刊
EUROPEAN PHYSICAL JOURNAL B
卷 90, 期 6, 页码 -出版社
SPRINGER
DOI: 10.1140/epjb/e2017-80115-7
关键词
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资金
- European Research Council under European Union's Seventh Framework Program [306447]
- Vienna Scientific Cluster (VSC) Research Center - Austrian Federal Ministry of Science, Research and Economy (BMWFW)
- Austrian Science Fund (FWF) through SFB [ViCoM F41]
- Research Unit of the Deutsche Forschungsgemeinschaft (DFG) [I-610-N16, FOR 1346]
- Institute of Solid State Physics
- Austrian Science Fund (FWF) [I 610, I 1395] Funding Source: researchfish
- Austrian Science Fund (FWF) [I610, I1395] Funding Source: Austrian Science Fund (FWF)
The mass-imbalanced Hubbard model represents a continuous evolution from the Hubbard to the Falicov-Kimball model. We employ dynamical mean field theory and study the paramagnetic metal-insulator transition, which has a very different nature for the two limiting models. Our results indicate that the metal-insulator transition rather resembles that of the Hubbard model as soon as a tiny hopping between the more localized fermions is switched on. At low temperatures we observe a first-order metal-insulator transition and a three peak structure. The width of the central peak is the same for the more and less mobile fermions when approaching the phase transition, which agrees with our expectation of a common Kondo temperature and phase transition for the two species.
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