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- W3104142458 abstract "The spin-gap phase of the one-dimensional t-J-J' model is studied by the level-crossing of the singlet and the triplet excitation spectra. The phase boundary obtained between the Tomonaga-Luttinger and the spin-gap phases is remarkably consistent with the analytical results at the $J,J'to 0$ and the low-density limits discussed by Ogata et al. The spin-gap phase has a single domain in the phase diagram even if the spin gap opens at half-filling. The phase boundary coincides with the $K_{rho}=1$ line where the Tomonaga-Luttinger liquid behaves as free electrons, in the low-density region. The relation between our method and the solution of the two-electron problem is also discussed." @default.
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- W3104142458 date "1998-03-15" @default.
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- W3104142458 title "Spin-Gap Phase in the One-Dimensionalt-J-J′Model" @default.
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- W3104142458 doi "https://doi.org/10.1143/jpsj.67.717" @default.
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