Phys. Rev. Lett. 75, 894–897 (1995)Spectral Function of the 1D Hubbard Model in the U→+∞ LimitReceived 18 January 1995; published in the issue dated 31 July 1995 We show that the one-particle spectral functions of the one-dimensional Hubbard model diverge at the Fermi energy like |ω-ɛF|-3/8 in the U→+∞ limit. The Luttinger liquid behavior |ω-ɛF|α, where α→1/8 as U→+∞, should be limited to |ω-ɛF|∼t2/U (for U large but finite), which shrinks to a single point, ω = ɛF, in that limit. The consequences for the observation of the Luttinger liquid behavior in photoemission and inverse photoemission experiments are discussed. © 1995 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.75.894
DOI:
10.1103/PhysRevLett.75.894
PACS:
71.27.+a, 71.20.Hk, 78.20.Bh, 79.60.Fr
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