Fig. 3: YSR quantum projection in an elliptical quantum corral.
From: Non-local detection of coherent Yu–Shiba–Rusinov quantum projections
a–c, Constant-current STM images of an empty Ag corral (a) with the major-axis length a = 18.20 nm and minor-axis length b = 13.30 nm, and the same corral with an Fe atom located on the major axis close to the left edge (b) and on the minor axis close to the top edge (c) (Vbias = −5 mV, Iset = 1 nA). d–i, Experimental (d–f) constant-height dI/dV maps and theoretical (g–i; Supplementary Note 3) LDOS maps of the empty corral (d and g), the corral with the Fe on the major (e and h) and on the minor axis (f and i) taken close to +Eβ (d–f: Vbias = 1.67 mV, Vstab = −5 mV, Istab = 1 nA, \({V}_{{\rm{mod}}}=100\,\upmu {\rm{V}}\); a.u.: output voltage (in volts) of the lock-in amplifier using the same lock-in parameters for all three dI/dV maps; g–i: for the theoretical parameters, see Supplementary Note 3). d–f have been set to the same ranges in the colour scale. The same applies to g and h. The colour-scale range in i was set to its minimum and maximum values. j, dI/dV spectra taken on the Fe atom in b (red) and on a Ag atom replacing the Fe atom (orange; see the corral in Supplementary Fig. 4j,m,n). k, dI/dV spectra taken on the empty locations indicated by the crosses in a and b of the empty corral (grey), the corral in b with the Fe atom (red) and the corral in which the Ag atom replaces the Fe atom (orange) (Vstab = −5 mV, Istab = 1 nA, \({V}_{{\rm{mod}}}=50\,\upmu {\rm{V}}\)).
