Signature of band inversion in the antiferromagnetic phase of axion insulator candidate <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>EuIn</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>As</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>
Takafumi Sato, Zhiwei Wang, Daichi Takane, Seigo Souma, Chaoxi Cui, Yongkai Li, Kosuke Nakayama, Tappei Kawakami, Yuya Kubota, Cephise Cacho, Timur K. Kim, Arian Arab, Vladimir N. Strocov, Yugui Yao, Takashi Takahashi
Abstract
This paper reports angle-resolved photoemission spectroscopy of EuIn${}_{2}$As${}_{2}$ which is predicted to host axion insulator and higher-order topological phases. The authors show direct evidence for a marked reconstruction of bulk-band structure associated with the antiferromagnetic transition at low temperature.
Topics & Concepts
AntiferromagnetismAxionCondensed matter physicsPhysicsTopological insulatorInsulator (electricity)Photoemission spectroscopyPhase transitionSignature (topology)Kondo insulatorSpectroscopyPhase (matter)Electronic band structureInversion (geology)Phase diagramMetal–insulator transitionIron-based superconductors researchTopological Materials and PhenomenaRare-earth and actinide compounds