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Hole motion in one-dimensional t-J-J’ model

✍ Scribed by I Doi; K Sano; K Takano

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
437 KB
Volume
165-166
Category
Article
ISSN
0921-4526

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✦ Synopsis

We examined the one-dimensional t -J -J' model by numerical diagonalization. This model describes electrons with infinite on-site repulsion, nearest-neighbor transfer t, exchange interaction J and, further, next-nearest-neighbor exchange interaction J'. In the case of one hole and J'/ J;(:0.5, the numerical ground state consists mainly of singlet dimers like that in the no-hole case (Heisenberg spin system). The energy spectrum and hole densities for low excited states show that the hole moves as a free quasiparticle, separated from the degrees of freedom for spins.

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