Insulating phases of the one-dimensional t-J model with nearest-neighbor repulsive interaction |
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Authors: | Hanqin Ding Yanshen Wang |
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Institution: | (1) Strong Coupling Modeling Group, Computational Materials Science Center, National Institute for Materials Science, Sengen 1-2-1, 305-0047 Tsukuba, Japan;(2) Computational Materials Science Center, National Institute for Materials Science, Sengen 1-2-1, Tsukuba, 305-0047 Ibaraki, Japan;(3) Computational Materials Science Center, National Institute for Materials Science, 1-2-1 Sengen, 305-0047 Tsukuba, Japan |
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Abstract: | Using the deformed Hubbard operator approach, we analytically study weak-coupling phase diagram of the one-dimensional t-J-V model at half filling. In the case of small deformed parameter ζ(≪1), the interactions induced by the no double occupancy constraint are softened, accessible by the bosonization field theory
and the renormalization group technique. The ground state exhibits insulating behavior of density-wave correlations. The bond-spin-density-wave
(BSDW) and
bond-charge-density-wave (BCDW) phases are realized in the whole weak-coupling regime while the charge-density-wave (CDW)
and spin-density-wave (SDW) phases depend on V/J > (V/J)
c
or V/J < (V/J)
c
, where (V/J)
c
= 1/4. Furthermore, our results are expected to adiabatically continue back to ζ = 1. |
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Keywords: | |
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