Instability of the Nagaoka ferromagnetic state of the two-dimensional infinite-{ital U} Hubbard model

Journal Article · Tue Mar 01 04:00:00 EST 1994 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.49.6723· OSTI ID:142609

Song, Z ^[1]

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1. Chinese Center of Advanced Science Technology (World Laboratory), P.O. Box 8730, Beijing 100080 (China)

A variational wave function with spin zero is presented for the infinite-{ital U} Hubbard model on a square lattice with the hole concentration {delta}=0.5. We find that the Nagaoka ferromagnetic state is unstable for this case in the thermodynamic limit. Some discussion about this method for other hole concentrations is given.

• OSTI ID: 142609
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 10 Vol. 49; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CALCULATION METHODS
FERROMAGNETISM
GROUND STATES
HIGH-TC SUPERCONDUCTORS
HUBBARD MODEL
INSTABILITY
TWO-DIMENSIONAL CALCULATIONS
VARIATIONAL METHODS
WAVE FUNCTIONS