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

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.
Publication status:
Published
Peer review status:
Peer reviewed
Version:
Accepted manuscript

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Publisher copy:
10.1103/PhysRevB.95.020402

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Department:
Mansfield College
Role:
Author
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Publisher:
American Physical Society Publisher's website
Journal:
Physical Review B Journal website
Volume:
95
Issue:
2
Publication date:
2017-01-05
Acceptance date:
2016-12-12
DOI:
ISSN:
2469-9969 and 2469-9950
Pubs id:
pubs:675518
URN:
uri:00a7a2cb-ab40-4833-a2d3-f356460fb8c1
UUID:
uuid:00a7a2cb-ab40-4833-a2d3-f356460fb8c1
Local pid:
pubs:675518
Keywords:

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