✦ LIBER ✦

Single-particle excitation spectrum of infinite-dimensional Hubbard model under finite magnetic field

✍ Scribed by T. Saso; A. Oguri

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 213 KB
Volume: 206-207
Category: Article
ISSN: 0921-4526
DOI: 10.1016/0921-4526(94)00399-g

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✦ Synopsis

Single-particle excitation spectrum of the Hubbard model in infinite-dimension is calculated under finite magnetic field by using the quantum Monte Carlo and the maximum entropy methods. It is found that (1) the filled part of the up-spin band expands and the empty part shrinks, while the down-spin band shows the opposite change; (2) the Kondo resonance peak is suppressed. These changes of the spectra are similar to those of the Anderson impurity found in terms of the 1/N expansion and cannot be interpreted by the rigid-band picture.