Article Dans Une Revue Nature Année : 2024

Signatures of a surface spin–orbital chiral metal

Chiara Bigi
Jun Fujii

Résumé

The relation between crystal symmetries, electron correlations and electronic structure steers the formation of a large array of unconventional phases of matter, including magneto-electric loop currents and chiral magnetism 1–6 . The detection of such hidden orders is an important goal in condensed-matter physics. However, until now, non-standard forms of magnetism with chiral electronic ordering have been difficult to detect experimentally 7 . Here we develop a theory for symmetry-broken chiral ground states and propose a methodology based on circularly polarized, spin-selective, angular-resolved photoelectron spectroscopy to study them. We use the archetypal quantum material Sr 2 RuO 4 and reveal spectroscopic signatures that, despite being subtle, can be reconciled with the formation of spin–orbital chiral currents at the surface of the material 8–10 . As we shed light on these chiral regimes, our findings pave the way for a deeper understanding of ordering phenomena and unconventional magnetism.

Fichier principal
Vignette du fichier
2402.08319v1.pdf (22.32 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Licence

Dates et versions

hal-05321338 , version 1 (18-10-2025)

Licence

Identifiants

Citer

Federico Mazzola, Wojciech Brzezicki, Maria Teresa Mercaldo, Anita Guarino, Chiara Bigi, et al.. Signatures of a surface spin–orbital chiral metal. Nature, 2024, 626 (8000), pp.752-758. ⟨10.1038/s41586-024-07033-8⟩. ⟨hal-05321338⟩
14 Consultations
9 Téléchargements

Altmetric

Partager

  • More