Transport Behavior of Planar Fe3GeTe2 Josephson Junctions

Josephson coupling of superconductors through novel 2D vdW systems can produce interesting phenomena not seen in traditional junctions. Fe3GeTe2 (FGT) for instance, is a magnetic semimetal with tunable ferromagnetism[1] and has been shown to exhibit large spin-polarization and spin-valve behavior in In based planar junctions[2]. Here we report on vdW based superconducting ferromagnetic superconducting (SFS) devices, through the construction and transport measurement of Al/FGT/Al junctions. Given the observed gate tunable magnetism, such a device may provide for electronic control of the in field transport behavior of such devices. 

[1] Deng, Y., et al. Nature 563, 94–99 (2018)

[2] Shvetsov, O.O., Jetp Lett. 115, 267–275 (2022)