Microscopy from Scientific Research

False-colour scanning electron microscopy image of device A including the measurement schematics. The SC Nb electrode (green) and the Ti/Au normal electrodes (yellow) are in contact with the V-doped (Bi x Sb 1− x ) 2 Te 3 thin film (cyan). For an upward, out-of-plane magnetization ( M > 0), the chiral 1D edge state propagates anticlockwise along the sample edge. The voltage V D between contacts 3 and 4 gives the downstream resistance R D ≡ V D / I d.c.

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