Direct observation of magnon fractionalization in the quantum spin ladder.

Thielemann, B; Rüegg, Ch; Rønnow, H M; Läuchli, A M; Caux, J-S; Normand, B; Biner, D; Krämer, K W; Güdel, H-U; Stahn, J; Habicht, K; Kiefer, K; Boehm, M; McMorrow, D F; Mesot, J

Thielemann, B; Rüegg, Ch; Rønnow, H M; Läuchli, A M; Caux, J-S; Normand, B; Biner, D; Krämer, K W; Güdel, H-U; Stahn, J; Habicht, K; Kiefer, K; Boehm, M; McMorrow, D F; Mesot, J.

Afiliación

Thielemann B; Laboratory for Neutron Scattering, ETH Zurich and Paul Scherrer Institute, CH-5232 Villigen, Switzerland.

Phys Rev Lett ; 102(10): 107204, 2009 Mar 13.

Article en En | MEDLINE | ID: mdl-19392156

RESUMEN

We measure by inelastic neutron scattering the spin excitation spectra as a function of applied magnetic field in the quantum spin-ladder material (C5H12N)2CuBr4. Discrete magnon modes at low fields in the quantum disordered phase and at high fields in the saturated phase contrast sharply with a spinon continuum at intermediate fields characteristic of the Luttinger-liquid phase. By tuning the magnetic field, we drive the fractionalization of magnons into spinons and, in this deconfined regime, observe both commensurate and incommensurate continua.

Buscar en Google

Añadir a Mi BVS

Imprimir

XML

PubMed Links

Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2009 Tipo del documento: Article País de afiliación: Suiza Pais de publicación: Estados Unidos

Buscar en Google

Añadir a Mi BVS

Imprimir

XML

PubMed Links