Charge and Spin Transport in the One-dimensional Hubbard Model

Details Charge and Spin Transport in the One-dimensional Hubbard Model Charge and Spin Transport in the One-dimensional Hubbard Model

2007-10-24

arxiv.org/abs/0710.4444v2

S. J. Gu, N. M. R. Peres, and J. M. P. Carmelo, J. Phys.: Condens. Matter 19 506203 (2007).

Physics

Condensed Matter

Strongly Correlated Electrons

24 pages, 14 figures

Scientific paper

10.1088/0953-8984/19/50/506203

In this paper we study the charge and spin currents transported by the elementary excitations of the one-dimensional Hubbard model. The corresponding current spectra are obtained by both analytic methods and numerical solution of the Bethe-ansatz equations. For the case of half-filling, we find that the spin-triplet excitations carry spin but no charge, while charge $\eta$-spin triplet excitations carry charge but no spin, and both spin-singlet and charge $\eta$-spin-singlet excitations carry neither spin nor charge currents.

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