Quantum-critical spin dynamics in a Tomonaga-Luttinger liquid studied with muon-spin relaxation

Möller, J.S.; Lancaster, T.; Blundell, S.J.; Pratt, F.L.; Baker, P.J.; Xiao, F.; Williams, R.C.; Hayes, W.; Turnbull, M.M.; Landee, C.P.

doi:10.1103/physrevb.95.020402

Quantum-critical spin dynamics in a Tomonaga-Luttinger liquid studied with muon-spin relaxation

Möller, J.S.; Lancaster, T.; Blundell, S.J.; Pratt, F.L.; Baker, P.J.; Xiao, F.; Williams, R.C.; Hayes, W.; Turnbull, M.M.; Landee, C.P.

Authors

J.S. Möller

Professor Tom Lancaster tom.lancaster@durham.ac.uk
Professor

S.J. Blundell

F.L. Pratt

P.J. Baker

F. Xiao

R.C. Williams

W. Hayes

M.M. Turnbull

C.P. Landee

Abstract

We demonstrate that quantum-critical spin dynamics can be probed in high magnetic fields using muon-spin relaxation (μ+SR). Our model system is the strong-leg spin ladder bis(2,3-dimethylpyridinium) tetrabromocuprate (DIMPY). In the gapless Tomonaga-Luttinger liquid phase we observe finite-temperature scaling of the μ+SR 1/T1 relaxation rate which allows us to determine the Luttinger parameter K. We discuss the benefits and limitations of local probes compared with inelastic neutron scattering.

Citation

Möller, J., Lancaster, T., Blundell, S., Pratt, F., Baker, P., Xiao, F., …Landee, C. (2017). Quantum-critical spin dynamics in a Tomonaga-Luttinger liquid studied with muon-spin relaxation. Physical Review B, 95(2), Article 020402(R). https://doi.org/10.1103/physrevb.95.020402

Journal Article Type	Article
Acceptance Date	Dec 12, 2016
Online Publication Date	Jan 3, 2017
Publication Date	Jan 3, 2017
Deposit Date	Jan 6, 2017
Publicly Available Date	Jan 18, 2017
Journal	Physical Review B
Print ISSN	2469-9950
Electronic ISSN	2469-9969
Publisher	American Physical Society
Peer Reviewed	Peer Reviewed
Volume	95
Issue	2
Article Number	020402(R)
DOI	https://doi.org/10.1103/physrevb.95.020402
Related Public URLs	https://arxiv.org/abs/1608.05059

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