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The Spin Stiffness and the Transverse Susceptibility of the Half-filled Hubbard Model

Zhu-Pei Shi·Rajiv R. P. Singh
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Abstract

The $T=0$ spin stiffness $ρ_{s}$ and the transverse susceptibility $χ_{\perp }$ of the square lattice half-filled Hubbard model are calculated as a function of the Hubbard parameter ratio $U/t$ by series expansions around the Ising limit. We find that the calculated spin-stiffness, transverse susceptibility, and sublattice magnetization for the Hubbard model smoothly approach the Heisenberg values for large $U/t$. The results are compared for different $U/t$ with RPA and other numerical studies.

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Zhu-Pei Shi, Rajiv R. P. Singh. 1995-08-01. The Spin Stiffness and the Transverse Susceptibility of the Half-filled Hubbard Model. https://doi.org/10.1209/0295-5075%2F31%2F4%2F006

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