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Durham University

Department of Physics

Staff profile

Publication details for Professor Tom Lancaster

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. (2017). Quantum-critical spin dynamics in a Tomonaga-Luttinger liquid studied with muon-spin relaxation. Physical Review B 95(2): 020402(R).

Author(s) from Durham


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.