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Raman response of topologically protected surface states in sub‐micrometric Pb 0.77 Sn 0.23 Se flakes
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Mehdipour, Sanaz, López‐Diaz, David, Velázquez, María Mercedes, Hidalgo, Pedro, Méndez, Bianchi, Luna, Mónica, Bellani, Vittorio, Amado, Mario, Balakrishnan, Geetha and Diez, Enrique (2020) Raman response of topologically protected surface states in sub‐micrometric Pb 0.77 Sn 0.23 Se flakes. Journal of Raman Spectroscopy, 51 (12). pp. 2489-2495. doi:10.1002/jrs.5998
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Official URL: http://dx.doi.org/10.1002/jrs.5998
Abstract
The Raman spectra of the topological crystalline insulator Pb0.77Sn0.23Se flakes of thickness below 150 nm show the presence of plasma enhanced phonons related to topologically protected surface electronic states. The Fröhlich interaction between the topologically protected surface Dirac electrons and the phonons activates the forbidden phonons near the center of the Brillouin zone. An overtone is observed at a higher wavenumber, with a resonant response with temperature, related to an enhancement of the long‐range coupling between the topologically protected surface electrons and phonons.
| Item Type: | Journal Article | ||||||||
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| Divisions: | Faculty of Science > Physics | ||||||||
| Journal or Publication Title: | Journal of Raman Spectroscopy | ||||||||
| Publisher: | John Wiley & Sons Ltd. | ||||||||
| ISSN: | 0377-0486 | ||||||||
| Official Date: | December 2020 | ||||||||
| Dates: |
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| Volume: | 51 | ||||||||
| Number: | 12 | ||||||||
| Page Range: | pp. 2489-2495 | ||||||||
| DOI: | 10.1002/jrs.5998 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Publisher Statement: | "This is the peer reviewed version of the following article: Mehdipour, S, López‐Diaz, D, Velázquez, MM, et al. Raman response of topologically protected surface states in sub‐micrometric Pb0.77Sn0.23Se flakes. J Raman Spectrosc. 2020; 51: 2489– 2495, which has been published in final form at http://dx.doi.org/10.1002/jrs.5998. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions." | ||||||||
| Access rights to Published version: | Restricted or Subscription Access |
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