Fig. 3: Magneto-chiral angular dependence of the supercurrent non-reciprocity on the WTe2 crystal structure. | Nature Communications

Fig. 3: Magneto-chiral angular dependence of the supercurrent non-reciprocity on the WTe2 crystal structure.

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

Fig. 3

a–c Field angle dependent Josephson diode efficiency (\(\eta=\frac{{I}_{c}^{+}-|{I}_{c}^{-}|}{{I}_{c}^{+}+|{I}_{c}^{-}|}\)) of NbSe2/Td-WTe2/NbSe2 junctions with a 2 nm, b 7 nm and c 60 nm thick Td-WTe2 barriers. Pink lines represent sine fits to the data. Top x-axis of the graphs show the \({\theta }_{{MC}}\) of each WTe2 junctions. d–f Polarization angle dependent relative intensity of two distinct Raman peaks ( ~ 160 cm−1 and ~210 cm-1), from which the a- and b-axis of the WTe2 can be determined. The a-axis and b-axis directions of the WTe2 flake found in this way are indicated by arrows in (a–c).

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