Quantum Phase Diagram of the t-Jz Chain Model

Details Quantum Phase Diagram of the t-Jz Chain Model Quantum Phase Diagram of the t-Jz Chain Model

2000-03-09

arxiv.org/abs/cond-mat/0003158v2

Phys. Rev. Lett. 85, 4755 (2000)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.85.4755

We present the quantum phase diagram of the one-dimensional $t$-$J_z$ model for arbitrary spin (integer or half-integer) and sign of the spin-spin interaction $J_z$, using an {\it exact} mapping to a spinless fermion model that can be solved {\it exactly} using the Bethe ansatz. We discuss its superconducting phase as a function of hole doping $\nu$. Motivated by the new paradigm of high temperature superconductivity, the stripe phase, we also consider the effect the antiferromagnetic background has on the $t$-$J_z$ chain intended to mimic the stripe segments.

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