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Spin-Charge separation in a model of two coupled chains | | M. Fabrizio
; A. Parola
; | | Date: |
19 Oct 1992 | | Abstract: | A model of interacting electrons living on two chains coupled by a transverse hopping $t_perp$, is solved exactly by bosonization technique. It is shown that $t_perp$ does modify the shape of the Fermi surface also in presence of interaction, although charge and spin excitations keep different velocities $u_
ho$, $u_sigma$. Two different regimes occur: at short distances, $xll xi = (u_
ho - u_sigma)/4t_perp$, the two chain model is not sensitive to $t_perp$, while for larger separation $xgg xi$ inter--chain hopping is relevant and generates further singularities in the electron Green function besides those due to spin-charge decoupling. (2 figures not included. Figure requests: FABRIZIO@ITSSISSA) | | Source: | arXiv, cond-mat/9210016 | | Other source: | [GID 905520] pmid10053734 | | Services: | Forum | Review | PDF | Favorites | |
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