Fig. 6: Tuned magneto-chirality using the artificial polar axis of a twisted WTe2 double-barrier JJ. | Nature Communications

Fig. 6: Tuned magneto-chirality using the artificial polar axis of a twisted WTe2 double-barrier JJ.

From: Intrinsic supercurrent non-reciprocity coupled to the crystal structure of a van der Waals Josephson barrier

Fig. 6

a Positive and negative Josephson critical current \({I}_{c}^{+}\) (green) and \(\left|{I}_{c}^{-}\right|\) (orange) versus in-plane (IP) magnetic field \({\mu }_{0}{H}_{\parallel }\) for twisted-WTe2 double barrier JJ. Josephson diode efficiency \(\eta (=\frac{{I}_{c}^{+}-|{I}_{c}^{-}|}{{I}_{c}^{+}+|{I}_{c}^{-}|})\) as a function of magnetic field strength (b) and angle (c) for the twisted WTe2 double-barrier JJ. Polarization-angle-dependent relative intensity of two distinct Raman peaks (~160 cm-1 and ~210 cm-1), from which one can determine the a- and b-axes of the top (d) and bottom (e) WTe2 barriers. The measured a-axis directions of the top and bottom WTe2 vdW layers are indicated by arrows in (c). As can be seen in (c) the magneto-chiral non-reciprocal supercurrents of the twisted-WTe2 double barrier JJ are successfully controlled by twisting the top WTe2 barrier relative to the bottom one.

Back to article page