Shift of Shapiro Step in High-Temperature Superconductor

TL;DR

This paper investigates how charge imbalance and boundary conditions affect the Shapiro step in high-temperature superconductor Josephson junctions under electromagnetic radiation, revealing shifts and slopes in the IV-characteristic.

Contribution

It demonstrates the role of charge imbalance and boundary conditions in shifting and shaping the Shapiro step in high-temperature superconductor junctions.

Findings

Charge imbalance causes a slope in the Shapiro step.

Nonperiodic boundary conditions shift the Shapiro step from its canonical position.

System parameters influence the extent of the Shapiro step shift.

Abstract

Influence of the charge imbalance effect on the system of intrinsic Josephson junctions of high temperature superconductors under external electromagnetic radiation are investigated. We demonstrate that the charge imbalance is responsible for a slope in the Shapiro step in the IV-characteristic. The nonperiodic boundary conditions shift the Shapiro step from the canonical position which determined by a frequency of external radiation. We also demonstrate how the system parameters affect on the shift of Shapiro step.