Gutzwiller wave function under magnetic field

Details Gutzwiller wave function under magnetic field Gutzwiller wave function under magnetic field

1996-06-19

arxiv.org/abs/cond-mat/9606142v1

Physics

Condensed Matter

Proceedings of SCES'96 (Physica B). 4 figures available on request from yoko@cmpt01.phys.tohoku.ac.jp

Scientific paper

Magnetization process of the Gutzwiller wave function is studied accurately by a variational Monte Carlo method. We apply it to the one-dimensional (1D) and 2D Hubbard models (HM), and to the 1D periodic Anderson model (PAM) without orbital degeneracy. For the HM, magnetization varies discontinuously to the full moment, as the magnetic field increases. For the PAM, the paramagnetic state is unstable against ferromagnetism, although the energy reduction thereof is small.

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