Fig. 4: Dispersion of Rashba Bands and CEC with out-of-plane Sz. | npj Quantum Materials

Fig. 4: Dispersion of Rashba Bands and CEC with out-of-plane Sz.

From: Orbital-enhanced warping effect in px,py-derived Rashba spin splitting of monatomic bismuth surface alloy

Fig. 4

a Dispersion of scattering vectors qn(E) along \(\overline {{\it{{\Gamma}{\rm{M}}}}}\) extracted from a series of FT-dI/dU mappings from 1.5 V to −0.45 V. b Spin-decomposed band structure of the BiCu2 surface with in-plane spin polarization Sx,y. The red and blue circles indicate opposite spin components from the surface states. Different qn are assigned with separate colors. c Spin-dependent CEC with out-of-plane spin polarization Sz induced by the hexagonal warping effect. d Spin-decomposed band structure with Sz. e QPI structures calculated from CEC in (c), red and blue arrows mark the two circle-like features observed in Fig. 3d. f Sz+ as a function of energy in the dispersion of the px,py (mj = 1/2)-derived band.

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