2020年9月1日
Signature of band inversion in the antiferromagnetic phase of axion insulator candidate EuIn2As2
Physical Review Research
- 巻
- 2
- 号
- 3
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/physrevresearch.2.033342
- 出版者・発行元
- American Physical Society (APS)
We have performed angle-resolved photoemission spectroscopy on EuIn2As2 which is predicted to be an axion insulator in the antiferromagnetic state. By utilizing soft-x-ray and vacuum-ultraviolet photons, we revealed a three-dimensional hole pocket centered at the Gamma point of the bulk Brillouin zone together with a heavily hole-doped surface state in the paramagnetic phase. Upon entering the antiferromagnetic phase, the band structure exhibits a marked reconstruction characterized by the emergence of an "M"-shaped bulk band near the Fermi level. The qualitative agreement with first-principles band-structure calculations suggests the occurrence of bulk-band inversion at the Gamma point in the antiferromagnetic phase. We suggest that EuIn2As2 provides a good opportunity to study the exotic quantum phases associated with a possible axion-insulator phase.
- リンク情報
-
- DOI
- https://doi.org/10.1103/physrevresearch.2.033342
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000604168900004&DestApp=WOS_CPL
- URL
- https://link.aps.org/article/10.1103/PhysRevResearch.2.033342
- URL
- http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevResearch.2.033342/fulltext
- ID情報
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- DOI : 10.1103/physrevresearch.2.033342
- eISSN : 2643-1564
- Web of Science ID : WOS:000604168900004