Superconductivity of the One-Dimensional d-p Model with p-p transfer

Abstract

Using the numerical diagonalization method, we investigate the one-dimensional $d$-$p$ model, simulating a Cu-O linear chain with strong Coulomb repulsions. Paying attention to the effect of the transfer energy $t_{pp}$ between the nearest neighbor oxygen-sites, we calculate the critical exponent of correlation functions $K_{\rho }$ based on the Luttinger liquid relations and the ground state energy $E_0(\varphi )$ as a function of an external flux $\varphi$. We find that the transfer $t_{pp}$ increases the charge susceptibility and the exponent $K_{\rho }$ in cooperation with the repulsion $U_d$ at Cu-site. We also show that anomalous flux quantization occurs for $K_{\rho }>1$. The superconducting region is presented on a phase diagram of $U_d$ vs. $t_{pp}$ plane.

4 pages, RevTex + 5 PS figures included

References in corpus (4)

• One-Dimensional Fermi liquids
• Bogoliubov Quasiparticle Excitations in the Two-Dimensional t-J Model
• Phase diagrams of electronic state on One Dimensional d-p Model
• Phase separation and the existence of superconductivity in a one-dimensional copper-oxygen model

Cited by in corpus (3)

• High Temperature Expansion for a Chain Model
• Superconductivity in the CuO double chain of Pr_2Ba_4Cu_7O_15-delta on the basis of Tomonaga-Luttinger liquid theory
• Ferromagnetism and phase separation in one-dimensional d-p and periodic Anderson models