Fig. 2: Quasi-two-dimensional surface electronic structure of La(0001).
From: Long-range focusing of magnetic bound states in superconducting lanthanum
a (left) Differential tunneling conductance spectrum in a wide energy range on a clean La(0001) surface (black solid line) and calculated LDOS in the vacuum 3 Å above the surface (blue dotted line). The pronounced peak around E = 0.1 meV can be attributed to a d-type surface state. (right) Extracted dispersion relation from the FT of the bias-dependent dI/dV maps (see [Supplementary Note 4 and Supplementary Fig. 4]) along the Q1 and Q2 directions. The error bars correspond to the full width at half maximum of the Gaussian fitting for the peak in the line section of FT maps. b Calculated Bloch spectral function (BSF) for the surface atomic layer of La(0001) along the Q1 and Q2 directions. c The 2D FT of the dI/dV map at VS = +3.0 mV showing a hexagonal scattering pattern. d BSF at the Fermi energy for the surface atomic layer, highlighting the FS formed by the surface bands. The white arrows present the corresponding quasiparticle scattering processes in (c).
