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Dirac semimetal phase and switching of band inversion in XMg(2)Bi(2) (X = Ba and Sr)
Topological Dirac semimetals (TDSs) offer an excellent opportunity to realize outstanding physical properties distinct from those of topological insulators. Since TDSs verified so far have their own problems such as high reactivity in the atmosphere and difficulty in controlling topological phases v...
Autores principales: | , , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8578568/ https://www.ncbi.nlm.nih.gov/pubmed/34754019 http://dx.doi.org/10.1038/s41598-021-01333-z |
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author | Takane, Daichi Kubota, Yuya Nakayama, Kosuke Kawakami, Tappei Yamauchi, Kunihiko Souma, Seigo Kato, Takemi Sugawara, Katsuaki Ideta, Shin-ichiro Tanaka, Kiyohisa Kitamura, Miho Horiba, Koji Kumigashira, Hiroshi Oguchi, Tamio Takahashi, Takashi Segawa, Kouji Sato, Takafumi |
author_facet | Takane, Daichi Kubota, Yuya Nakayama, Kosuke Kawakami, Tappei Yamauchi, Kunihiko Souma, Seigo Kato, Takemi Sugawara, Katsuaki Ideta, Shin-ichiro Tanaka, Kiyohisa Kitamura, Miho Horiba, Koji Kumigashira, Hiroshi Oguchi, Tamio Takahashi, Takashi Segawa, Kouji Sato, Takafumi |
author_sort | Takane, Daichi |
collection | PubMed |
description | Topological Dirac semimetals (TDSs) offer an excellent opportunity to realize outstanding physical properties distinct from those of topological insulators. Since TDSs verified so far have their own problems such as high reactivity in the atmosphere and difficulty in controlling topological phases via chemical substitution, it is highly desirable to find a new material platform of TDSs. By angle-resolved photoemission spectroscopy combined with first-principles band-structure calculations, we show that ternary compound BaMg(2)Bi(2) is a TDS with a simple Dirac-band crossing around the Brillouin-zone center protected by the C(3) symmetry of crystal. We also found that isostructural SrMg(2)Bi(2) is an ordinary insulator characterized by the absence of band inversion due to the reduction of spin–orbit coupling. Thus, XMg(2)Bi(2) (X = Sr, Ba, etc.) serves as a useful platform to study the interplay among crystal symmetry, spin–orbit coupling, and topological phase transition around the TDS phase. |
format | Online Article Text |
id | pubmed-8578568 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-85785682021-11-10 Dirac semimetal phase and switching of band inversion in XMg(2)Bi(2) (X = Ba and Sr) Takane, Daichi Kubota, Yuya Nakayama, Kosuke Kawakami, Tappei Yamauchi, Kunihiko Souma, Seigo Kato, Takemi Sugawara, Katsuaki Ideta, Shin-ichiro Tanaka, Kiyohisa Kitamura, Miho Horiba, Koji Kumigashira, Hiroshi Oguchi, Tamio Takahashi, Takashi Segawa, Kouji Sato, Takafumi Sci Rep Article Topological Dirac semimetals (TDSs) offer an excellent opportunity to realize outstanding physical properties distinct from those of topological insulators. Since TDSs verified so far have their own problems such as high reactivity in the atmosphere and difficulty in controlling topological phases via chemical substitution, it is highly desirable to find a new material platform of TDSs. By angle-resolved photoemission spectroscopy combined with first-principles band-structure calculations, we show that ternary compound BaMg(2)Bi(2) is a TDS with a simple Dirac-band crossing around the Brillouin-zone center protected by the C(3) symmetry of crystal. We also found that isostructural SrMg(2)Bi(2) is an ordinary insulator characterized by the absence of band inversion due to the reduction of spin–orbit coupling. Thus, XMg(2)Bi(2) (X = Sr, Ba, etc.) serves as a useful platform to study the interplay among crystal symmetry, spin–orbit coupling, and topological phase transition around the TDS phase. Nature Publishing Group UK 2021-11-09 /pmc/articles/PMC8578568/ /pubmed/34754019 http://dx.doi.org/10.1038/s41598-021-01333-z Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Takane, Daichi Kubota, Yuya Nakayama, Kosuke Kawakami, Tappei Yamauchi, Kunihiko Souma, Seigo Kato, Takemi Sugawara, Katsuaki Ideta, Shin-ichiro Tanaka, Kiyohisa Kitamura, Miho Horiba, Koji Kumigashira, Hiroshi Oguchi, Tamio Takahashi, Takashi Segawa, Kouji Sato, Takafumi Dirac semimetal phase and switching of band inversion in XMg(2)Bi(2) (X = Ba and Sr) |
title | Dirac semimetal phase and switching of band inversion in XMg(2)Bi(2) (X = Ba and Sr) |
title_full | Dirac semimetal phase and switching of band inversion in XMg(2)Bi(2) (X = Ba and Sr) |
title_fullStr | Dirac semimetal phase and switching of band inversion in XMg(2)Bi(2) (X = Ba and Sr) |
title_full_unstemmed | Dirac semimetal phase and switching of band inversion in XMg(2)Bi(2) (X = Ba and Sr) |
title_short | Dirac semimetal phase and switching of band inversion in XMg(2)Bi(2) (X = Ba and Sr) |
title_sort | dirac semimetal phase and switching of band inversion in xmg(2)bi(2) (x = ba and sr) |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8578568/ https://www.ncbi.nlm.nih.gov/pubmed/34754019 http://dx.doi.org/10.1038/s41598-021-01333-z |
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