The quasiparticle weight of the two-dimensional Hubbard model in the t-matrix approximation is discussed in comparison with a recent report by Yokoyama and Fukuyama (J. Phys. Soc. Jpn. 66 (1997), 529) where the breakdown of the quasiparticle description of the Fermi liquid was concluded.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)