Bound states and field-polarized Haldane modes in a quantum spin ladder

Ward, Simon; Bouillot, P.; Kollath, C.; Giamarchi, T.; Schmidt, K.P.; Normand, Bruce; Krämer, Karl; Biner, Daniel; Bewley, R.; Guidi, T.; Boehm, Martin; McMorrow, Des; Rüegg, Christian (2017). Bound states and field-polarized Haldane modes in a quantum spin ladder. Physical review letters, 118(17) American Physical Society 10.1103/PhysRevLett.118.177202

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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.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Departement of Chemistry and Biochemistry

UniBE Contributor:

Krämer, Karl and Biner, Daniel

Subjects:

500 Science > 530 Physics
500 Science > 540 Chemistry

ISSN:

0031-9007

Publisher:

American Physical Society

Language:

English

Submitter:

Karl Krämer

Date Deposited:

10 Jan 2017 11:31

Last Modified:

23 Oct 2019 12:02

Publisher DOI:

10.1103/PhysRevLett.118.177202

ArXiv ID:

1609.00198v1

BORIS DOI:

10.7892/boris.90908

URI:

https://boris.unibe.ch/id/eprint/90908

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