期刊
PHYSICAL REVIEW B
卷 82, 期 15, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.82.155102
关键词
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资金
- Serbian Ministry of Science and Technological Development [OI 141035]
- NATO Science for Peace and Security Programme Reintegration [EAP.RIG.983235]
- NSF [DMR-0542026, DMR-0746395, DMR-0906943]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0906943] Funding Source: National Science Foundation
Strong correlations effects, which are often associated to the approach to a Mott insulating state, in some cases may be observed even far from half filling. This typically happens whenever the intersite Coulomb repulsion induces a tendency toward charge ordering, an effect that confines the electrons, and in turn favors local moment formation, i.e., Mott localization. A distinct intermediate regime then emerges as a precursor of such a Wigner-Mott transition, which is characterized by both charge and spin correlations, displaying large mass enhancements and strong renormalizations of other Fermi-liquid parameters. Here we present a careful study of a quarter-filled extended Hubbard model-a simple example where such physics can be studied in detail, and discuss its relevance for the understanding of the phenomenology of low-density two-dimensional electron gases.
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