The Structural Influence on the Rashba-type Spin-Splitting in Surface Alloys

Abstract

The Bi/Ag(111), Pb/Ag(111), and Sb/Ag(111) surface alloys exhibit a two-dimensional band structure with a strongly enhanced Rashba-type spin-splitting, which is in part attributed to the structural asymmetry resulting from an outward relaxation of the alloy atoms. In order to gain further insight into the spin-splitting mechanism, we have experimentally determined the outward relaxation of the alloy atoms in these surface alloys using quantitative low-energy electron diffraction (LEED). The structure plays an important role in the size of the spinsplitting as it dictates the potential landscape, the symmetry as well as the orbital character. Furthermore, we discuss the band ordering of the Pb/Ag(111) surface alloy as well as the reproducible formation of Sb/Ag(111) surface alloys with unfaulted (face-centered cubic) and faulted (hexagonally close-packed) toplayer stacking.

7 pages, 3 figures, 3tables

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• Observation of Dirac surface states in the noncentrosymmetric superconductor BiPd
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• Structure and electronic properties of the ($\sqrt{3}\times \sqrt{3}$)$R30^{\circ }$ SnAu${}_2$/Au(111) surface alloy
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• Visualizing the multifractal wavefunctions of a disordered two-dimensional electron gas
• Combined large spin-splitting and one dimensional confinement in surface alloys
• Giant Rashba-type spin splitting through spin-dependent interatomic-hopping
• First-principles Study of Rashba Effect in Ultra-thin Bismuth Surface Alloys
• Atomic and mesoscopic structure of Dy-based surface alloys on noble metals
• Current-induced spin polarisation in Rashba-Dresselhaus systems under different point groups
• Vertical bonding distances and interfacial band structure of PTCDA on a Sn-Ag surface alloy
• Enhancement of Giant Rashba Splitting in BiTeI under Asymmetric Interlayer Interaction
• Spin Currents in Rashba Altermagnets: From Equilibrium to Nonlinear Regimes