Unconventional transformation of spin Dirac phase across a topological quantum phase transition
Abstract
The topology of a topological material can be encoded in its surface states. These surface states can only be removed by a bulk topological quantum phase transition into a trivial phase. Here we use photoemission spectroscopy to image the formation of protected surface states in a topological insulator as we chemically tune the system through a topological transition. Surprisingly, we discover an exotic spin-momentum locked, gapped surface state in the trivial phase that shares many important properties with the actual topological surface state in anticipation of the change of topology. Using a spin-resolved measurement, we show that apart from a surface bandgap these states develop spin textures similar to the topological surface states well before the transition. Our results provide a general paradigm for understanding how surface states in topological phases arise from a quantum phase transition and are suggestive for the future realization of Weyl arcs, condensed matter supersymmetry and other fascinating phenomena in the vicinity of a quantum criticality.
- Authors:
-
- Princeton Univ., Princeton, NJ (United States)
- Princeton Univ., Princeton, NJ (United States); Peking Univ., Beijing (China)
- Paul Scherrer Inst. (PSI), Villigen (Switzerland)
- Paul Scherrer Inst. (PSI), Villigen (Switzerland); Ecole Polytechnique Fedeerale de Lausanne, Lausanne (Switzerland)
- Northeastern Univ., Boston, MA (United States)
- National Tsing Hua Univ., Hsinchu (Taiwan)
- National Tsing Hua Univ., Hsinchu (Taiwan); Academia Sinica, Taipei (Taiwan)
- National Univ. of Singapore (Singapore)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1224062
- Grant/Contract Number:
- FG02-07ER46352; AC03-76SF00098; AC03-76SF00515; FG02-05ER46200
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 6; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; physical sciences; applied physics; condensed matter
Citation Formats
Xu, Su -Yang, Neupane, Madhab, Belopolski, Ilya, Liu, Chang, Alidoust, Nasser, Bian, Guang, Jia, Shuang, Landolt, Gabriel, Slomski, Batosz, Dil, J. Hugo, Shibayev, Pavel P., Basak, Susmita, Chang, Tay -Rong, Jeng, Horng -Tay, Cava, Robert J., Lin, Hsin, Bansil, Arun, and Hasan, M. Zahid. Unconventional transformation of spin Dirac phase across a topological quantum phase transition. United States: N. p., 2015.
Web. doi:10.1038/ncomms7870.
Xu, Su -Yang, Neupane, Madhab, Belopolski, Ilya, Liu, Chang, Alidoust, Nasser, Bian, Guang, Jia, Shuang, Landolt, Gabriel, Slomski, Batosz, Dil, J. Hugo, Shibayev, Pavel P., Basak, Susmita, Chang, Tay -Rong, Jeng, Horng -Tay, Cava, Robert J., Lin, Hsin, Bansil, Arun, & Hasan, M. Zahid. Unconventional transformation of spin Dirac phase across a topological quantum phase transition. United States. https://doi.org/10.1038/ncomms7870
Xu, Su -Yang, Neupane, Madhab, Belopolski, Ilya, Liu, Chang, Alidoust, Nasser, Bian, Guang, Jia, Shuang, Landolt, Gabriel, Slomski, Batosz, Dil, J. Hugo, Shibayev, Pavel P., Basak, Susmita, Chang, Tay -Rong, Jeng, Horng -Tay, Cava, Robert J., Lin, Hsin, Bansil, Arun, and Hasan, M. Zahid. 2015.
"Unconventional transformation of spin Dirac phase across a topological quantum phase transition". United States. https://doi.org/10.1038/ncomms7870. https://www.osti.gov/servlets/purl/1224062.
@article{osti_1224062,
title = {Unconventional transformation of spin Dirac phase across a topological quantum phase transition},
author = {Xu, Su -Yang and Neupane, Madhab and Belopolski, Ilya and Liu, Chang and Alidoust, Nasser and Bian, Guang and Jia, Shuang and Landolt, Gabriel and Slomski, Batosz and Dil, J. Hugo and Shibayev, Pavel P. and Basak, Susmita and Chang, Tay -Rong and Jeng, Horng -Tay and Cava, Robert J. and Lin, Hsin and Bansil, Arun and Hasan, M. Zahid},
abstractNote = {The topology of a topological material can be encoded in its surface states. These surface states can only be removed by a bulk topological quantum phase transition into a trivial phase. Here we use photoemission spectroscopy to image the formation of protected surface states in a topological insulator as we chemically tune the system through a topological transition. Surprisingly, we discover an exotic spin-momentum locked, gapped surface state in the trivial phase that shares many important properties with the actual topological surface state in anticipation of the change of topology. Using a spin-resolved measurement, we show that apart from a surface bandgap these states develop spin textures similar to the topological surface states well before the transition. Our results provide a general paradigm for understanding how surface states in topological phases arise from a quantum phase transition and are suggestive for the future realization of Weyl arcs, condensed matter supersymmetry and other fascinating phenomena in the vicinity of a quantum criticality.},
doi = {10.1038/ncomms7870},
url = {https://www.osti.gov/biblio/1224062},
journal = {Nature Communications},
issn = {2041-1723},
number = ,
volume = 6,
place = {United States},
year = {Fri Apr 17 00:00:00 EDT 2015},
month = {Fri Apr 17 00:00:00 EDT 2015}
}
Web of Science
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