Ward, S;
Bouillot, P;
Kollath, C;
Giamarchi, T;
Schmidt, KP;
Normand, B;
Krämer, KW;
... Rüegg, C; + view all
(2017)
Bound states and field-polarized Haldane modes in a quantum spin ladder.
Physical Review Letters
, 118
, Article 177202. 10.1103/PhysRevLett.118.177202.
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Abstract
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 modelling of the dynamical response demonstrates our complete quantitative understanding of these states.
| Type: | Article |
|---|---|
| Title: | Bound states and field-polarized Haldane modes in a quantum spin ladder |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.118.177202 |
| Publisher version: | http://doi.org/10.1103/PhysRevLett.118.177202 |
| Language: | English |
| Additional information: | © 2017 American Physical Society. This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL 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: | https://discovery-pp.ucl.ac.uk/id/eprint/1529018 |
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