Continuous evolution of the 2D Hubbard model from an insulator to a metal

R. Preuss, R. Putz, W. Hanke, W. Von Der Linden

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Abstract

We present Quantum-Monte-Carlo results for the momentum and frequency dependent spectral weight A(k, ω) showing the evolution from insulating to metallic behavior in the two-dimensional Hubbard model. As observed in recent photoemission experiments for cuprates, in both undoped and doped cases the electronic excitations display two rather similar general features, i.e. a quasiparticle (QP)-like dispersive band of small width of the order of the exchange interaction J and a broad valence- and conduction-band background. Arguments for one and the same many-body physics namely the continuous reduction of the spin-spin correlation length and related changes in the QP-spin correlations behind the continuous evolution to the metallic QP dispersion are given.
Original languageEnglish
Pages (from-to)1659-1661
Number of pages3
JournalThe Journal of Physics and Chemistry of Solids
Volume56
Issue number12
DOIs
Publication statusPublished - 1 Dec 1995

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Hubbard model
Exchange interactions
Photoemission
Valence bands
Conduction bands
Momentum
Physics
Metals
insulators
metals
Experiments
two dimensional models
cuprates
conduction bands
photoelectric emission
valence
momentum
physics
electronics
excitation

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Continuous evolution of the 2D Hubbard model from an insulator to a metal. / Preuss, R.; Putz, R.; Hanke, W.; Von Der Linden, W.

In: The Journal of Physics and Chemistry of Solids, Vol. 56, No. 12, 01.12.1995, p. 1659-1661.

Research output: Contribution to journalArticleResearchpeer-review

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