Frustration enhanced by Kitaev exchange in a j̃eff=12 triangular antiferromagnet - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review B Année : 2021

Frustration enhanced by Kitaev exchange in a j̃eff=12 triangular antiferromagnet

Résumé

Triangular Heisenberg antiferromagnets are prototypes of geometric frustration, even if for nearest-neighbor interactions quantum fluctuations are not usually strong enough to destroy magnetic ordering: stronger frustration is required to stabilize a spin-liquid phase. On the basis of static magnetization and electron spin resonance measurements, we demonstrate the emergence ofj eff = 1 2 moments in the triangular-lattice magnet Na 2 BaCo(PO 4) 2. These moments are subject to an extra source of frustration that causes magnetic correlations to set in far above both the magnetic ordering and Weiss temperatures. Corroborating thej eff = 1 2 ground state, theory identifies ferromagnetic Kitaev exchange anisotropy as an additional frustrating agent, altogether putting forward Na 2 BaCo(PO 4) 2 as a promising Kitaev spin-liquid material.
Fichier principal
Vignette du fichier
kagame2021.pdf (1.01 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03586808 , version 1 (24-02-2022)

Identifiants

Citer

C Wellm, W Roscher, J Zeisner, A Alfonsov, R Zhong, et al.. Frustration enhanced by Kitaev exchange in a j̃eff=12 triangular antiferromagnet. Physical Review B, 2021, 104, ⟨10.1103/physrevb.104.l100420⟩. ⟨hal-03586808⟩
25 Consultations
142 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More