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Title: Spin-polarized surface resonances accompanying topological surface state formation

Abstract

Topological insulators host spin-polarized surface states born out of the energetic inversion of bulk bands driven by the spin-orbit interaction. Here we discover previously unidentified consequences of band-inversion on the surface electronic structure of the topological insulator Bi 2 Se 3 . By performing simultaneous spin, time, and angle-resolved photoemission spectroscopy, we map the spin-polarized unoccupied electronic structure and identify a surface resonance which is distinct from the topological surface state, yet shares a similar spin-orbital texture with opposite orientation. Its momentum dependence and spin texture imply an intimate connection with the topological surface state. Calculations show these two distinct states can emerge from trivial Rashba-like states that change topology through the spin-orbit-induced band inversion. This work thus provides a compelling view of the coevolution of surface states through a topological phase transition, enabled by the unique capability of directly measuring the spin-polarized unoccupied band structure.

Authors:
 [1];  [2];  [3]; ORCiD logo [4];  [5];  [6];  [1];  [6];  [7];  [6]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., Stanford, CA (United States)
  3. Univ. of California, Berkeley, CA (United States)
  4. North Carolina State Univ., Raleigh, NC (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  7. SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., Stanford, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1348409
Alternate Identifier(s):
OSTI ID: 1377538
Grant/Contract Number:  
AC02-76SF00515; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 7; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; phase transitions and critical phenomena; surfaces, interfaces and thin films; topological insulators

Citation Formats

Jozwiak, Chris, Sobota, Jonathan A., Gotlieb, Kenneth, Kemper, Alexander F., Rotundu, Costel R., Birgeneau, Robert J., Hussain, Zahid, Lee, Dung -Hai, Shen, Zhi -Xun, and Lanzara, Alessandra. Spin-polarized surface resonances accompanying topological surface state formation. United States: N. p., 2016. Web. doi:10.1038/ncomms13143.
Jozwiak, Chris, Sobota, Jonathan A., Gotlieb, Kenneth, Kemper, Alexander F., Rotundu, Costel R., Birgeneau, Robert J., Hussain, Zahid, Lee, Dung -Hai, Shen, Zhi -Xun, & Lanzara, Alessandra. Spin-polarized surface resonances accompanying topological surface state formation. United States. https://doi.org/10.1038/ncomms13143
Jozwiak, Chris, Sobota, Jonathan A., Gotlieb, Kenneth, Kemper, Alexander F., Rotundu, Costel R., Birgeneau, Robert J., Hussain, Zahid, Lee, Dung -Hai, Shen, Zhi -Xun, and Lanzara, Alessandra. Fri . "Spin-polarized surface resonances accompanying topological surface state formation". United States. https://doi.org/10.1038/ncomms13143. https://www.osti.gov/servlets/purl/1348409.
@article{osti_1348409,
title = {Spin-polarized surface resonances accompanying topological surface state formation},
author = {Jozwiak, Chris and Sobota, Jonathan A. and Gotlieb, Kenneth and Kemper, Alexander F. and Rotundu, Costel R. and Birgeneau, Robert J. and Hussain, Zahid and Lee, Dung -Hai and Shen, Zhi -Xun and Lanzara, Alessandra},
abstractNote = {Topological insulators host spin-polarized surface states born out of the energetic inversion of bulk bands driven by the spin-orbit interaction. Here we discover previously unidentified consequences of band-inversion on the surface electronic structure of the topological insulator Bi 2 Se 3 . By performing simultaneous spin, time, and angle-resolved photoemission spectroscopy, we map the spin-polarized unoccupied electronic structure and identify a surface resonance which is distinct from the topological surface state, yet shares a similar spin-orbital texture with opposite orientation. Its momentum dependence and spin texture imply an intimate connection with the topological surface state. Calculations show these two distinct states can emerge from trivial Rashba-like states that change topology through the spin-orbit-induced band inversion. This work thus provides a compelling view of the coevolution of surface states through a topological phase transition, enabled by the unique capability of directly measuring the spin-polarized unoccupied band structure.},
doi = {10.1038/ncomms13143},
journal = {Nature Communications},
number = ,
volume = 7,
place = {United States},
year = {Fri Oct 14 00:00:00 EDT 2016},
month = {Fri Oct 14 00:00:00 EDT 2016}
}

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Works referencing / citing this record:

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