Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2000-04-18
Physics
Condensed Matter
Strongly Correlated Electrons
12 pages, Latex, Four figures are included, final published version [accepted for publication in Phys. Rev. B (July 1 issue)]
Scientific paper
10.1103/PhysRevB.62.134
The influence of the additional second neighbor hopping t' on the spin response of the t-J model in the underdoped and optimally doped regimes is studied within the fermion-spin theory. Although the additional second neighbor hopping t' is systematically accompanied with the reduction of the dynamical spin structure factor and susceptibility, the qualitative behavior of the dynamical spin structure factor and susceptibility of the t-t'-J model is the same as in the case of t-J model. The integrated dynamical spin structure factor spectrum is almost t' independent, and the integrated dynamical spin susceptibility still shows the particularly universal behavior as $I(\omega,T)\propto {\rm arctan}[a_{1}\omega/T+a_{3}(\omega/T)^{3}]$.
Feng Shiping
Ke Xianglin
Yuan Fang-Fang
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