2015/02/09 by A. Takayama, T. Sato, S. Souma +3 · 1 citation
Materials Science · Physics and Astronomy · #Bismuth #Condensed matter physics #Coupling (piping) #Electron #Electronic and Structural Properties of Oxides #Electronic band structure #Enhanced Data Rates for GSM Evolution #Materials science #Photoemission spectroscopy #Physics #Quantum and electron transport phenomena #Quantum mechanics #Semiconductor #Spectral line #Spin (aerodynamics) #Spin polarization #Spin–orbit interaction #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevlett.114.066402
published as Phys. Rev. Lett. 114, 066402 (2015)
openalex publication_date 2015/02/09 · arxiv created 2015/02/11 · arxiv updated 2015/02/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
To realize a one-dimensional (1D) system with strong spin-orbit coupling is a big challenge in modern physics, since the electrons in such a system are predicted to exhibit exotic properties unexpected from the 2D or 3D counterparts, while it was difficult to realize genuine physical properties inherent to the 1D system. We demonstrate the first experimental result that directly determines the purely 1D band structure by performing spin-resolved angle-resolved photoemission spectroscopy of Bi islands on a silicon surface that contains a metallic 1D edge structure with unexpectedly large Rashba-type spin-orbit coupling suggestive of the nontopological nature. We have also found a sizable out-of-plane spin polarization of the 1D edge state, consistent with our first-principles band calculations. Our result provides a new platform to realize exotic quantum phenomena at the 1D edge of the strong spin-orbit-coupling systems.