• Editors' Suggestion

Topologically Entangled Rashba-Split Shockley States on the Surface of Grey Arsenic

Peng Zhang, J.-Z. Ma, Y. Ishida, L.-X. Zhao, Q.-N. Xu, B.-Q. Lv, K. Yaji, G.-F. Chen, H.-M. Weng, X. Dai, Z. Fang, X.-Q. Chen, L. Fu, T. Qian, H. Ding, and S. Shin
Phys. Rev. Lett. 118, 046802 – Published 27 January 2017
PDFHTMLExport Citation

Abstract

We discover a pair of spin-polarized surface bands on the (111) face of grey arsenic by using angle-resolved photoemission spectroscopy (ARPES). In the occupied side, the pair resembles typical nearly-free-electron Shockley states observed on noble-metal surfaces. However, pump-probe ARPES reveals that the spin-polarized pair traverses the bulk band gap and that the crossing of the pair at Γ¯ is topologically unavoidable. First-principles calculations well reproduce the bands and their nontrivial topology; the calculations also support that the surface states are of Shockley type because they arise from a band inversion caused by crystal field. The results provide compelling evidence that topological Shockley states are realized on As(111).

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 3 November 2016

DOI:https://doi.org/10.1103/PhysRevLett.118.046802

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Peng Zhang1,2, J.-Z. Ma2, Y. Ishida1, L.-X. Zhao2, Q.-N. Xu2, B.-Q. Lv2, K. Yaji1, G.-F. Chen2,3, H.-M. Weng2,3, X. Dai2,3, Z. Fang2,3, X.-Q. Chen4, L. Fu5, T. Qian2,3,*, H. Ding2,3,†, and S. Shin1,‡

  • 1Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
  • 2Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 3Collaborative Innovation Center of Quantum Matter, Beijing, China
  • 4Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Science, Shenyang 110016, China
  • 5Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA

  • *tqian@iphy.ac.cn
  • dingh@iphy.ac.cn
  • shin@issp.u-tokyo.ac.jp

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 118, Iss. 4 — 27 January 2017

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×