Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2002-12-11
Physics
Condensed Matter
Strongly Correlated Electrons
10 pages, 6 figures, accepted for publication by Physics Letters A
Scientific paper
The conductance for a single impurity in a one dimensional gas with electron-electron interaction and Zeeman splitting $v_F^\uparrow - v_F^\downarrow = \Delta \neq 0$ is considered. We find that for an extented Hubbard model, $\rho_\uparrow^R \rho_\uparrow^L + \rho_\downarrow^R \rho_\downarrow^L$, a Luttinger liquid for spin up and spin down is obtained. As a result the conductances for spin up $G_\uparrow$ and spin down $G_\downarrow$ are not equal. The anisotropy in the conductances $G_\uparrow \neq G_\downarrow$ gives rise to a spin polarized wire.
Chang Hsuan-Yeh
Schmeltzer David
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