Abstract
Under the assumption of long-range antiferromagnetic order at low temperatures, the spectral functions and the density of states are calculated in the two-dimensional Hubbard model with half-filling in the Hubbard-I approximation. The results are compared with the data obtained using an exact numerical technique, namely, the quantum Monte Carlo method. The influence of hopping to the next-to-nearest neighbor on the formation of the electronic structure is considered.
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Translated from Fizika Tverdogo Tela, Vol. 46, No. 8, 2004, pp. 1428–1432.
Original Russian Text Copyright © 2004 by Ovchinnikov, Shne\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\)der.
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Ovchinnikov, S.G., Shneider, E.I. Spectral functions in the hubbard model with half-filling. Phys. Solid State 46, 1469–1473 (2004). https://doi.org/10.1134/1.1788780
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DOI: https://doi.org/10.1134/1.1788780