Proposed Design of a Josephson Diode

Effect of Rashba and Dresselhaus spin–orbit coupling on supercurrent rectification and magnetochiral anisotropy of ballistic Josephson junctions

“…This is a supercurrent diode effect (first envisioned in Ref. [29]), which has been first demonstrated in bulk superconductors [30] and then in JJs [28]. In both cases, the SOI was of Rashba-type and the supercurrent rectification driven by the in-plane field perpendicular to the current.…”

At the interface between electron and hole-doped cuprates

“…Theoretical work suggests that such junctions cross the Mott insulator ground state in a depletion zone at the interface [10][11][12]. We will refer to this as Mott depletion.…”

“…It can even lead to a system where the exact doping level of the two cuprates determines the full behavior of the junction, ranging from a normal Josephson contact or a tunneling barrier, to a situation where in a depletion zone the entire phase diagram is traversed and interface superconductivity can occur [12]. With the appearance of the Mott insulator ground state, a Josephson Mott diode is predicted [11], where the critical current can be modulated by the bias voltage.…”

“…Indeed, various theoretical analyses have been made on the properties and possibilities of combinations of electron-and holedoped cuprates, ranging from the formation of a Mott insulator depletion zone [12], unconventional Josephson junctions [10,11] and superradiant light emission [95].…”

“…However, since the energy gap appears due to strong correlations in the cuprates, there may be significant differences. This has inspired theoretical exploration into the semiconductor physics parallels that can be drawn, ranging from pn-junction effects such as Esaki diodes [10], Josephson diodes [11] and depletion zones with unusual properties [12], to effects related to exciton formation with strong localization of single excitons in the antiferromagnetic background of the cuprates at low doping [13], Bose-Einstein condensation and phase separation of various ordered phases at finite densities [14,15], and an enhanced thermoelectric figure of merit [16].…”