UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

Direct Observation of Magnon Fractionalization in the Quantum Spin Ladder

Thielemann, B; Ruegg, C; Ronnow, HM; Lauchli, AM; Caux, JS; Normand, B; Biner, D; ... Mesot, J; + view all (2009) Direct Observation of Magnon Fractionalization in the Quantum Spin Ladder. PHYS REV LETT , 102 (10) , Article 107204. 10.1103/PhysRevLett.102.107204. Green open access

[img]
Preview
PDF
168575.pdf

Download (1MB)

Abstract

We measure by inelastic neutron scattering the spin excitation spectra as a function of applied magnetic field in the quantum spin-ladder material (C5H12N)(2)CuBr4. 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.

Type: Article
Title: Direct Observation of Magnon Fractionalization in the Quantum Spin Ladder
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.102.107204
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.102.107204
Language: English
Additional information: © 2009 The American Physical Society
Keywords: MAGNETIC-FIELD, ANTIFERROMAGNET, CRITICALITY, DYNAMICS, CHAINS
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/168575
Downloads since deposit
113Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item