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The authors attribute the mixed h/e and h/2e-periodic superconducting interference patterns to crossed Andreev reflection (CAR) through the accumulation edge modes. This is shown by comparing Josephson junctions made of InSb flakes with different edge crystal orientations, and further emphasized by the h/eperiodic SQUID oscillation in the depleted regime, indicating the CAR amplitude exceeds the normal Andreev reflection.
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