Quasiparticle Dispersion of the 2D Hubbard Model: From an Insulator to a Metal

R. Preuss, Werner Hanke, W. von der Linden

Research output: Contribution to journalArticle

Abstract

On the basis of quantum Monte Carlo results the evolution of the spectral weight A(k,ω) of the two-dimensional Hubbard model is studied from insulating to metallic behavior. As observed in recent photoemission experiments for cuprates, the electronic excitations display essentially doping-independent features; a quasiparticlelike dispersive narrow band of width of the order of the exchange interaction J and a broad valence- and conduction-band background. The continuous evolution is traced back to one and the same many-body origin: the doping-dependent antiferromagnetic spin-spin correlation.
Original languageEnglish
Pages (from-to)1344-1347
Number of pages4
JournalPhysical Review Letters
Volume75
Issue number7
DOIs
Publication statusPublished - 1 Aug 1995

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