Self-Assembled Nanowires with Giant Rashba-Type Band Splitting

Abstract

We investigated Pt-induced nanowires on the Si(110) surface using scanning tunneling microscopy (STM) and angle-resolved photoemission (ARP). High resolution STM images show a well-ordered nanowire array of 1.6 nm width and 2.7 nm separation. ARP reveals fully occupied one dimensional (1D) bands with a Rashba-type split dispersion. Local dI/dV spectra further indicate well confined 1D electron channels on the nanowires, whose density of states characteristics are consistent with the Rashba-type band splitting. The observed energy and momentum splitting of the bands are among the largest ever reported for Rashba systems, suggesting the Pt-Si nanowire as a unique 1D giant Rashba system. This self-assembled nanowire can be exploited for silicon-based spintronics devices as well as the quest for Majorana Fermions.

to be published in Phys. Rev. Lett

References in corpus (5)

• Strong spin-orbit splitting on Bi surfaces
• Search for Majorana fermions in multiband semiconducting nanowires
• Spin-selective Peierls transition in interacting one-dimensional conductors with spin-orbit interaction
• Silicon surface with giant spin-splitting
• Direct evidence of spin-split one-dimensional metallic surface state on Si(557)-Au

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• Visualization of Unconventional Rashba Band and Vortex Zero Mode in Topopogical Superconductor Candidate AuSn${}_4$
• Influence of the vicinal substrate miscut on the anisotropic two-dimensional electronic transport in Al2O3-SrTiO3 heterostructures
• Fermi level tuning of one-dimensional giant Rashba system on a semiconductor substrate: Bi/GaSb(110)-(2x1)
• Giant Rashba-Splitting of One-Dimensional Metallic States in Bi Dimer Lines on InAs(100)
• Transverse Rashba Effect and Unconventional Magnetocrystalline Anisotropy in Double-Gd-adsorbed Zigzag Graphene Nanoribbon
• Impact of spin-orbit coupling on electron correlation corrections to the density of states in anisotropic conductors