Intrinsic Josephson Effect in the Layered Two-dimensional t-J Model

TL;DR

This paper investigates the intrinsic Josephson effect in high-temperature superconductors using a layered two-dimensional t-J model, revealing doping-dependent behavior of the Josephson current.

Contribution

It introduces a mean-field and Gutzwiller approximation approach to analyze the Josephson effect in the t-J model, highlighting doping effects.

Findings

Maximum Josephson current occurs near optimal doping.

Doping significantly influences the Josephson current magnitude.

The study provides theoretical insights into high-Tc superconductor behavior.

Abstract

The intrinsic Josephson effect in the high-Tc superconductors is studied using the layered two-dimensional t-J model. The d.c.Josephson current which flows perpendicular to the t-J planes is obtained within the mean-field approximation and the Gutzwiller approximation. We find that the Josephson current has its maximum near the optimum doping region as a function of the doping rate.