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Showing 1–10 of 10 results
Advanced filters: Author: Jungpil Seo Clear advanced filters

  • Topological insulators are materials in which a relativistic effect known as spin–orbit coupling gives rise to surface states that resemble chiral edge modes in quantum Hall systems, but with unconventional spin textures. It has been suggested that a feature of such spin-textured boundary states is their insensitivity to spin-independent scattering, which is thought to protect them from backscattering. Here, scanning tunnelling spectroscopy and angle-resolved photoemission spectroscopy are used to confirm this prediction.

    • Pedram Roushan
    • Jungpil Seo
    • Ali Yazdani
    Research
    Nature
    Volume: 460, P: 1106-1109

  • Topological surface states are a class of electronic states that might be of interest in quantum computing or spintronic applications. They are predicted to be robust against imperfections, but so far there has been no evidence that these states do transmit through naturally occurring surface defects. Here, scanning tunnelling microscopy has been used to show that topological surface states of antimony can be transmitted through naturally occurring barriers that block non-topological surface states of common metals.

    • Jungpil Seo
    • Pedram Roushan
    • Ali Yazdani
    Research
    Nature
    Volume: 466, P: 343-346

  • Helical Dirac fermion states in topological insulators could enable dissipation-free spintronics and robust quantum information processors. A study of the influence of disorder on these states shows that although they are resilient against backscattering by magnetic impurities, fluctuations caused by charge impurities could cause problems for such applications.

    • Haim Beidenkopf
    • Pedram Roushan
    • Ali Yazdani
    Research
    Nature Physics
    Volume: 7, P: 939-943

  • The Kondo hybridization typically occurs in heavy-fermion systems containing f electrons, although recently it has been reported in d-electron systems. Kim et al. report spectroscopic evidence of the Kondo hybridization in FeTe and discuss it role in the mechanism of the magnetic order.

    • Younsik Kim
    • Min-Seok Kim
    • Changyoung Kim
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-9