The behavior of the critical magnetic field and correlation functions in the finite-size Hubbard-like models

Journal Article · Mon Jan 20 04:00:00 EST 1997 · International Journal of Modern Physics B

DOI:https://doi.org/10.1142/S0217979297000198· OSTI ID:462627

Kocharian, A N ^[1]

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1. Northridge Univ., CA (United States). Dept. of Physics and Astronomy

The author presents exact analytical results for a critical field and correlations functions for N site ring and arbitrary size two dimensional coupled chains in a two component Hubbard model with a strong magnetic field and exactly at half-filling. The critical field near the Nagaoka instability with one spin and two spin flips is driven by Coulomb interaction, lattice geometry, dimensionality and crucially depends on the number of atomic sites N. Unsaturated ferromagnetism, reminiscent of Nagaoka-like behavior, and spin liquid state are examined in the structure of off-diagonal spin correlations at large U.

• OSTI ID: 462627
• Report Number(s): CONF-9603223--
• Journal Information: International Journal of Modern Physics B, Journal Name: International Journal of Modern Physics B Journal Issue: 1-2 Vol. 11; ISSN IJPBEV; ISSN 0217-9792
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANALYTICAL SOLUTION
CORRELATION FUNCTIONS
CRITICAL FIELD
FERROMAGNETISM
HUBBARD MODEL