Bound States and Field-Polarized Haldane Modes in a Quantum Spin Ladder

Beitrag in einer Fachzeitschrift

Details zur Publikation

Autor(en): Ward S, Mena M, Bouillot P, Kollath C, Giamarchi T, Schmidt KP, Normand B, Kramer KW, Biner D, Bewley R, Guidi T, Boehm M, Mcmorrow DF, Ruegg C
Zeitschrift: Physical Review Letters
Jahr der Veröffentlichung: 2017
Band: 118
Heftnummer: 17
ISSN: 0031-9007
Sprache: Englisch


The challenge of one-dimensional systems is to understand their physics beyond the level of known elementary excitations. By high-resolution neutron spectroscopy in a quantum spin-ladder material, we probe the leading multiparticle excitation by characterizing the two-magnon bound state at zero field. By applying high magnetic fields, we create and select the singlet (longitudinal) and triplet (transverse) excitations of the fully spin-polarized ladder, which have not been observed previously and are close analogs of the modes anticipated in a polarized Haldane chain. Theoretical modeling of the dynamical response demonstrates our complete quantitative understanding of these states.

FAU-Autoren / FAU-Herausgeber

Schmidt, Kai Phillip Prof. Dr.
Professur für Theoretische Physik

Autor(en) der externen Einrichtung(en)
Geneva University Hospitals / Hôpitaux universitaires de Genève (HUG)
Institute Laue-Langevin (ILL)
Paul Scherrer Institute (PSI)
Rutherford Appleton Laboratory
Universität Bern
University College London (UCL) (University of London)
University of Geneva / Université de Genève (UNIGE)


Ward, S., Mena, M., Bouillot, P., Kollath, C., Giamarchi, T., Schmidt, K.P.,... Ruegg, C. (2017). Bound States and Field-Polarized Haldane Modes in a Quantum Spin Ladder. Physical Review Letters, 118(17).

Ward, S., et al. "Bound States and Field-Polarized Haldane Modes in a Quantum Spin Ladder." Physical Review Letters 118.17 (2017).


Zuletzt aktualisiert 2018-06-08 um 22:25