Critical spin dynamics of Heisenberg ferromagnets revisited
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DOI: 10.1103/physrevb.105.024403
Abstract: We calculate the dynamic structure factor S(k, ω) in the paramagnetic regime of quantum Heisenberg ferromagnets for temperatures T close to the critical temperature Tc using our recently developed functional renormalization group approach to quantum… read more here.
Keywords: critical spin; spin; spin dynamics; heisenberg ferromagnets ... See more keywords
Quantum-critical spin dynamics in a Tomonaga-Luttinger liquid studied with muon-spin relaxation
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DOI: 10.1103/physrevb.95.020402
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… read more here.
Keywords: muon spin; relaxation; quantum critical; critical spin ... See more keywords