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Phys. Rev. B 42, 6850–6852 (1990)

Single spin flip in the Nagaoka state: Problems with the Gutzwiller wave function

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Thilo Kopp and Andrei E. Ruckenstein
Serin Physics Laboratory, Rutgers University, Piscataway, New Jersey 08855

Stefan Schmitt-Rink
AT&T Bell Laboratories, Murray Hill, New Jersey 07974

Received 14 June 1990; published in the issue dated 1 October 1990

We reconsider the problem of a single spin flip in the saturated ferromagnetic state (the Nagaoka state) of the infinite-U Hubbard model for a small (but finite) hole concentration. By studying the ground-state energy and the spin-flip spectral function, we argue that recently proposed Gutzwiller-like variational wave functions are not appropriate for studying this problem in one and two dimensions.

© 1990 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.42.6850
DOI:
10.1103/PhysRevB.42.6850
PACS:
75.10.Jm
 
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