2021年12月
Dirac semimetal phase and switching of band inversion in XMg2Bi2 (X = Ba and Sr)
Scientific Reports
- 巻
- 11
- 号
- 1
- 記述言語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1038/s41598-021-01333-z
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 BaMg2Bi2 is a TDS with a simple Dirac-band crossing around the Brillouin-zone center protected by the C3 symmetry of crystal. We also found that isostructural SrMg2Bi2 is an ordinary insulator characterized by the absence of band inversion due to the reduction of spin–orbit coupling. Thus, XMg2Bi2 (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.
- リンク情報
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- DOI
- https://doi.org/10.1038/s41598-021-01333-z
- PubMed
- https://www.ncbi.nlm.nih.gov/pubmed/34754019
- Scopus
- https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85118672482&origin=inward 本文へのリンクあり
- Scopus Citedby
- https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85118672482&origin=inward
- ID情報
-
- DOI : 10.1038/s41598-021-01333-z
- eISSN : 2045-2322
- PubMed ID : 34754019
- SCOPUS ID : 85118672482