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. 2018 Oct 8;9:4153. doi: 10.1038/s41467-018-06661-9

Fig. 2.

Fig. 2

C2v symmetric interferences on ZrSiSe(001) in single-defect-induced quasiparticle interference (s-QPI) patterns. a and b are voltage-dependent dI/dV maps (18×18 nm2, 400 mV, 1 nA) and Fourier transformed (FT) dI/dV maps, depicting the real and reciprocal space s-QPI patterns arising from a single C2v symmetric defect, respectively. The defect is attributed to a Si vacancy. With increasing bias voltage, the intrinsic C4v symmetry gradually recovers. The arrow indicates the wave propagating direction