Josephson Diode

TL;DR

This paper introduces a novel Josephson junction formed by superconductors near the superconductor-Mott-insulator transition with asymmetric current response due to a self-organized depletion region, revealing new phase dynamics observable via noise spectrum.

Contribution

It presents a new type of Josephson junction with asymmetric properties arising from a self-organized Mott-insulating depletion region at the interface.

Findings

Asymmetric current-voltage response observed.

Collective excitations lead to unique phase dynamics.

Potential experimental detection through noise spectrum analysis.

Abstract

We propose a new type of Josephson junction formed by two superconductors close to the superconductor-Mott-insulator transition, one of which is doped with holes and the other is doped with electrons. A self-organized Mott-insulating depletion region is formed at the interface between two superconductors, giving rise to an asymmetric response of current to the external voltage. The collective excitations of the depletion region result in a novel phase dynamics that can be measured experimentally in the noise spectrum of the Josephson current.