Spin-Momentum Locking and Ultrafast Spin-Charge Conversion in Ultrathin Epitaxial Bi
angle-resolved photoemission spectroscopy
spin-charge conversion
spin-resolved angle-resolved photoemission spectroscopy
surface states THz-TDS
topological insulator
Journal
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
ISSN: 2198-3844
Titre abrégé: Adv Sci (Weinh)
Pays: Germany
ID NLM: 101664569
Informations de publication
Date de publication:
Jul 2023
Jul 2023
Historique:
revised:
10
04
2023
received:
18
02
2023
medline:
26
4
2023
pubmed:
26
4
2023
entrez:
25
4
2023
Statut:
ppublish
Résumé
The helicity of three-dimensional (3D) topological insulator surface states has drawn significant attention in spintronics owing to spin-momentum locking where the carriers' spin is oriented perpendicular to their momentum. This property can provide an efficient method to convert charge currents into spin currents, and vice-versa, through the Rashba-Edelstein effect. However, experimental signatures of these surface states to the spin-charge conversion are extremely difficult to disentangle from bulk state contributions. Here, spin- and angle-resolved photo-emission spectroscopy, and time-resolved THz emission spectroscopy are combined to categorically demonstrate that spin-charge conversion arises mainly from the surface state in Bi
Identifiants
pubmed: 37098646
doi: 10.1002/advs.202301124
pmc: PMC10323647
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e2301124Subventions
Organisme : Agence Nationale de la Recherche
ID : ANR-10- LABX-0035 SPICY
Organisme : Agence Nationale de la Recherche
ID : ANR-21-CE24- 0011 TRAPIST
Organisme : Agence Nationale de la Recherche
ID : ANR-21-ESRE-0025 2DMAG
Organisme : HORIZON EUROPE Framework Programme
ID : 964735
Organisme : HORIZON EUROPE Framework Programme
ID : 863155
Informations de copyright
© 2023 The Authors. Advanced Science published by Wiley-VCH GmbH.
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