Spin-Gap Phase in the One-Dimensional t-J-J'Model
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概要
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The spin-gap phase of the one-dimensional t-J-J' model is sttudied by the level-crossing of thesinglet and the triplet excitation spectra. The phase botrndary obtained between the Totnonaga-Luttinger and the spin-gap phases is renuarkably consistent with the analytical results at theJ, J' -) O and the low-density lirnits disctrssed by Ogata et at. The spin-gap plaase has a singledonaain in the phase diagram even if the spin gap opens at half-filling. Tlae phase boundarycoincides with the K. :: 1 line wl'xere tlae Toxaaonaga-Luttinger liquid behaves as free electrons,in the low-density region. The relation between our znethod and the solution of the two-electronproblena is also discussed.
- 社団法人日本物理学会の論文
- 1998-03-15
著者
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Nakamura Masaaki
Department Of Applied Physics Faculty Of Science Tokyo University Of Science
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Nakamura Masaaki
Department Of Physics Kyushu University : Department Of Physics Tokyo Institute Of Technology
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