Strong-Coupling Behavior of Two $t-J$ Chains with Interchain Single-Electron Hopping

Details Strong-Coupling Behavior of Two $t-J$ Chains with Interchain Single-Electron Hopping Strong-Coupling Behavior of Two $t-J$ Chains with Interchain Single-Electron Hopping

1994-01-12

arxiv.org/abs/cond-mat/9401024v2

Physics

Condensed Matter

12 pages, no figures, revtex 3.0 (to appaer in Phys. Rev. B). This is an original version of manuscript, not a revised version

Scientific paper

10.1103/PhysRevB.49.9997

Using the fermion-spin transformation to implement spin-charge separation of constrained electrons, a model of two $t-J$ chains with interchain single-electron hopping is studied by abelian bosonization. After spin-charge decoupling the charge dynamics can be trivially solved, while the spin dynamics is determined by a strong-coupling fixed point where the correlation functions can be calculated explicitly. This is a generalization of the Luther-Emery line for two-coupled $t-J$ chains. The interchain single-electron hopping changes the asymptotic behavior of the interchain spin-spin correlation functions and the electron Green function, but their exponents are independent of the coupling strength.

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