Observation of Highly Spin-Polarized Dangling Bond Surface States in Rare-Earth Pnictide Tellurides

Observation of Highly Spin-Polarized Dangling Bond Surface States in Rare-Earth Pnictide Tellurides

© 2024 Wiley‐VCH GmbH.

Détails bibliographiques
Publié dans:Advanced materials (Deerfield Beach, Fla.). - 1998. - 37(2025), 1 vom: 07. Jan., Seite e2411733
Auteur principal: Cai, Yongqing (Auteur)
Autres auteurs: Zhang, Jing, Zha, Heming, Zhang, Fayuan, Wang, Yuan, Chen, Weizhao, Hao, Zhanyang, Deng, Liwei, Liu, Wenjing, Rong, Hongtao, Jiang, Zhicheng, Yang, Yichen, Jiang, Qi, Liu, Zhengtai, Ye, Mao, Rienks, E D L, Huang, Yaobo, Guo, Shu, Lin, Junhao, Wang, Le, Liu, Qihang, Qiao, Shan, Chen, Chaoyu
Format: Article en ligne
Langue:English
Publié: 2025
Accès à la collection:Advanced materials (Deerfield Beach, Fla.)
Sujets:Journal Article dangling bond surface state site asymmetry spin splitting spin‐orbit coupling spin‐orbital‐momentum‐layer locking
Description
Résumé:© 2024 Wiley‐VCH GmbH.
To generate and manipulate spin-polarized electronic states in solids are crucial for modern spintronics. The textbook routes employ quantum well states or Shockley/topological type surface states whose spin degeneracy is lifted by strong spin-orbit coupling and inversion symmetry breaking at the surface/interface. The resultant spin polarization is usually truncated because of the intertwining between multiple orbitals. Here a unique type of surface states is realized, namely, dangling bond surface states in a family of ternary rare-earth pnictide tellurides RePnTe (Re = La, Gd, Ce; Pn = Sb, Bi), with robust band structure and sizeable spin splitting. Spin and angle-resolved photoemission spectroscopy measurements reveal high spin polarization and distinct spin-momentum locking texture, which, according to the theoretical analysis, arise from local site asymmetry and surface-purified spin-orbital texture. The work extends the so-called "hidden spin polarization" from the bulk to the surface, presenting an intriguing spin-orbital-momentum-layer locking phenomenon, which may shed lights on potential spintronic applications
Description:Date Revised 08.01.2025
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202411733