Spin Dynamics for the t-J Model

Details Spin Dynamics for the t-J Model Spin Dynamics for the t-J Model

1998-05-24

arxiv.org/abs/cond-mat/9805308v2

Phys. Lett. A242, 94 (1998)

Physics

Condensed Matter

3 pages, three figures are added

Scientific paper

10.1016/S0375-9601(98)00195-9

The spin dynamics at the finite temperature for the t-J model in the underdoped and optimal doped regimes is studied within the fermion-spin theory. It is shown that the dynamical spin structure factor spectrum at the antiferromagnetic wave vector $Q=(\pi,\pi)$ are separated as low- and high-frequency parts, respectively, but the high-frequency part is suppressed in the dynamical susceptibility spectrum $\chi^{''}(Q,\omega)$, while the low-frequency part is the temperature dependent, which are in qualitative agreement with the experiments and numerical simulations.

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