Longitudinal Josephson effect in systems with pairing of spatially separated electrons and holes

TL;DR

This paper investigates the longitudinal Josephson effect in bilayer electron-hole systems with potential barriers, analyzing how the critical current depends on carrier density and barrier properties.

Contribution

It provides a theoretical analysis of the Josephson effect in electron-hole bilayers, considering both weak and strong coupling regimes and their influence on critical current behavior.

Findings

Critical current proportional to barrier transparency product at high density

Critical current inversely proportional to barrier height sum at low density

Different regimes exhibit distinct dependencies on system parameters

Abstract

Longitudinal non-dissipative current states in bilayer electron-hole systems in the presence of potential barriers that divide the system into left and right sides was investigated. The consideration is performed both for the case of weak carrier coupling (high density) and strong coupling (low density). It is shown that in the high-density limit, the critical current is proportional to the product of the transparencies of the barriers in the electron and hole layers, whereas in the low-density limit, the current is inversely proportional to the sum of the heights of the potential barriers.