Fig. 5: Inverted mirage and pseudo NOT gate.

a Topography for an EQC (a = 7.6 nm and e = 0.65) with an Fe adatom placed at the left focus. b The corresponding dI/dV map at the bias voltage of +39 mV for the EQC in a. c Topography of the EQC without the Fe adatom at the left focus. d The corresponding dI/dV map with the same bias voltage of +39 mV for the empty EQC in panel c. Dashed circles mark the focal positions, for which black means 1 and white means 0.