Field-induced states and excitations in the quasicritical spin- 1 / 2 chain linarite - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Physical Review Letters Année : 2018

Field-induced states and excitations in the quasicritical spin- 1 / 2 chain linarite

Résumé

The mineral linarite, PbCuSO$_4$(OH)$_2$, is a spin-1/2 chain with frustrating nearest-neighbor ferromagnetic and next-nearest-neighbor antiferromagnetic exchange interactions. Our inelastic neutron scattering experiments performed above the saturation field establish that the ratio between these exchanges is such that linarite is extremely close to the quantum critical point between spin-multipolar phases and the ferromagnetic state. We show that the predicted quantum multipolar phases are fragile and actually suppressed by a tiny orthorhombic exchange anisotropy and weak interchain interactions in favor of a dipolar fan phase. Including this anisotropy in classical simulations of a nearly critical model explains the field-dependent phase sequence of the phase diagram of linarite, its strong dependence of the magnetic field direction, and the measured variations of the wave vector as well as the staggered and the uniform magnetizations in an applied field.
Fichier principal
Vignette du fichier
CeEnKrFa1.pdf (1.16 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-01936395 , version 1 (26-10-2022)

Identifiants

Citer

Eron Cemal, Mechthild Enderle, Reinhard Kremer, Bjorn Fak, E. Ressouche, et al.. Field-induced states and excitations in the quasicritical spin- 1 / 2 chain linarite. Physical Review Letters, 2018, 120 (6), pp.067203. ⟨10.1103/PhysRevLett.120.067203⟩. ⟨hal-01936395⟩
106 Consultations
25 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More