Hole Dynamics in Two-Dimensional Antiferromagnetic Mott Insulators

1998/11/27 by F. F. Assaad, Assaad, F. F., Masatoshi Imada +2
Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con) #Theoretical and Computational Physics #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.48550/arxiv.cond-mat/9811384

5 pages including 5 figures

arxiv created 1998/11/27 · openalex publication_date 1998/11/27 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The dispersion relation of a doped hole in the half-filled 2D Hubbard model is shown to follow a k⁴ law around the (0,pi) and (pi,0) points in the Brillouin zone. Upon addition of pair-hopping processes this dispersion relation is unstable towards a k² law. The above follows from T=0 Quantum Monte calculations of the single particle spectral function A(k, omega) on 16 X 16 lattices. We discuss finite dopings and argue that the added term restores coherence to charge dynamics and drives the system towards a d_x² - y² superconductor.

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