Magnetic chirality of the spin triplet in the spin-ladder compound Sr14Cu24O41 as seen via polarized inelastic neutron scattering

We report the direct observation by polarized inelastic neutron scattering experiments at low fields (3.5 T) of the splitting of the spin triplet of magnetic excitations in the response associated with the ladders in the composite cuprate Sr14Cu24O41. By conveniently choosing the magnetic field conf...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2011-04, Vol.83 (14)
Hauptverfasser: Lorenzo, Emilio, Regnault, L. P., Boullier, Cyrille, Martin, Nicolas, Vanishri, S., Marin, Christophe
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:We report the direct observation by polarized inelastic neutron scattering experiments at low fields (3.5 T) of the splitting of the spin triplet of magnetic excitations in the response associated with the ladders in the composite cuprate Sr14Cu24O41. By conveniently choosing the magnetic field configuration and by making use of the spin chirality of the excitations, the splitting can be observed at relatively low fields. In this way, resonant excitations can be separated from the remainder of magnetic and phonon excitations at high temperatures. In Sr14Cu24O41, the 32-meV gapped mode vanishes above ∼200 K, close to the hole-crystal melting temperature previously observed by resonant x-ray and neutron diffraction.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.83.140413