Orbital-dependent spin textures in Bi2Se3 quantum well states

Chiu-Yun Lin, Kenneth Gotlieb, Chris Jozwiak, Jonathan A. Sobota, Zhi-Xun Shen, James G. Analytis, Zahid Hussain, and Alessandra Lanzara
Phys. Rev. B 98, 075149 – Published 27 August 2018

Abstract

Understanding the fine interplay between spin and orbital degrees of freedom in the surface states of topological insulators is the key to the development of next-generation spintronics devices. So far, the majority of studies have focused on the helical spin texture of the topologically protected surface state (TSS) and little attention has been devoted to the spin texture of the other surface states: the bulk-originated quantum well states (QWSs). This paper presents such study in a prototypical topological insulator, Bi2Se3. By using spin- and angle-resolved photoemission spectroscopy, we reveal a full momentum-dependent spin texture of the QWSs and their response to light polarization. We find that these states share a similar spin-orbital texture with the TSS. This paper shows an intimate correlation between the surface and bulk states, which was overseen before, and provides relevant information to understand how the surface states evolve with the bulk states.

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  • Received 18 December 2017
  • Corrected 22 October 2018

DOI:https://doi.org/10.1103/PhysRevB.98.075149

©2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Corrections

22 October 2018

Correction: The names of three authors and their respective support statements were missing (along with their email addresses) in the original publication and have now been inserted.

Authors & Affiliations

Chiu-Yun Lin1,2,*, Kenneth Gotlieb3,2,†, Chris Jozwiak4,‡, Jonathan A. Sobota5,6,§, Zhi-Xun Shen5,6,¶, James G. Analytis1,2,∥, Zahid Hussain4,**, and Alessandra Lanzara1,2,††

  • 1Department of Physics, University of California, Berkeley, California 94720, USA
  • 2Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
  • 3Graduate Group in Applied Science & Technology, University of California, Berkeley, California 94720, USA
  • 4Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
  • 5Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
  • 6Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, California 94305, USA

  • *chiuyunlin@lbl.gov
  • kgotlieb@lbl.gov
  • cmjozwiak@lbl.gov
  • §sobota@stanford.edu
  • zxshen@stanford.edu
  • analytis@berkeley.edu
  • **zhussain@lbl.gov
  • ††alanzara@lbl.gov

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Issue

Vol. 98, Iss. 7 — 15 August 2018

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