Luttinger-liquid behavior and superconducting correlations in t-J ladders

C. A. Hayward; D. Poilblanc

doi:10.1103/PhysRevB.53.11721

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Luttinger-liquid behavior and superconducting correlations in t-J ladders

C. A. Hayward, D. Poilblanc

DOI 10.1103/PhysRevB.53.11721 · Physical Review B

T1

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Abstract

The low-energy behavior of the isotropic t-J ladder system is investigated using exact diagonalization techniques, specifically finding the Drude weight, the charge velocity, and the compressibility. By applying the ideas of Luttinger-liquid theory, we determine the correlation exponent Kρ which defines the behavior of the long-range correlations in the system. The boundary to phase separation is determined and a phase diagram is presented. At low electron density, a Tomonaga-Luttinger-like phase is stabilized while at higher electron densities a gapped phase with power law pairing correlations is stabilized: A large region of this gapped phase is found to exhibit dominant superconducting correlations. © 1996 The American Physical Society.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La1-xSrxCuO2.5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown