Fig. 3: Spatial mapping of the low-energy electronic structure.
From: Evidence for ground state coherence in a two-dimensional Kondo lattice
a STM topography of the 1T/1H heterostructure (Vs = 4 mV, I = 1.5 nA, T = 0.34 K, 3.3 × 3.3 nm2). The blue circles represent the boundaries of the Star-of-David clusters. b dI/dV spectra taken at the center of the three neighboring clusters indicated dots in (a) (Va.c. = 40 µV, B = 0 T). c Spatially resolved map (32 × 32 pixel, raw data) of Δ (separation of peaks) taken in the region shown in (a). The map is extracted from a 40 × 40 dI/dV grid acquired at 0.34 K (Va.c. = 40 µV, B = 0 T). The color scale of the Δ map is shown in the histogram in (d). e Conductance map (constant height) acquired at Vs = +1 mV and I = 0.16 nA. The atomic position of the SoD cluster is indicated. f Topograph of the region where the conductance maps were taken (Vs = −5 mV, I = 0.18 nA). g Conductance map at the opposite polarity (Vs = −1 mV, I = 0.2 nA) in the same region (for both conductance maps: Va.c. = 20 µV, B = 0 T, T = 0.34 K).
