We successfully produce Josephson junctions by stacking NbSe2 flakes, where the twist angle and strain are responsible for a weak link. Field sweep measurements are taken to characterize these...Show moreWe successfully produce Josephson junctions by stacking NbSe2 flakes, where the twist angle and strain are responsible for a weak link. Field sweep measurements are taken to characterize these devices. These measurements highlight the importance of the direction of the applied magnetic field. Prompted by this, simulations of the critical current given an arbitrarily shaped interface area are presented and compared to measurements.Show less
Triplet superconductivity in lateral Josephson junctions has only been shown in the ferromagnet CrO2. We succeeded in creating a disk-shaped lateral cobalt Josephson junction with a trench width...Show moreTriplet superconductivity in lateral Josephson junctions has only been shown in the ferromagnet CrO2. We succeeded in creating a disk-shaped lateral cobalt Josephson junction with a trench width below 20 nm. The device shows promising signs of superconducting triplet correlations. For exchange fields up to 15 mT we see an increase in the critical current, possibly caused by an increase of the magnetic non-collinearity as the Ni generating layer aligns with the field. We also observe oscillations in the critical current. These oscillations have a period of approximately 4 mT and are believed to be the result of a flux quantisation effect in the superconducting cobalt disk.Show less
