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Breakdown of Hydrodynamic Transport Theory in the Ordered Phase of Helimagnets

T. R. Kirkpatrick·D. Belitz
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Abstract

It is shown that strong fluctuations preclude a hydrodynamic description of transport phenomena in helimagnets, such as MnSi, at T>0. This breakdown of hydrodynamics is analogous to the one in chiral liquid crystals. Mode-mode coupling effects lead to infinite renormalizations of various transport coefficients, and the actual macroscopic description is nonlocal. At T=0 these effects are weakened due to the fluctuation-dissipation theorem, and the renormalizations remain finite. Observable consequences of these results, as manifested in the neutron scattering cross-section, are discussed

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BibTeXRIS

T. R. Kirkpatrick, D. Belitz. 2006-08-09. Breakdown of Hydrodynamic Transport Theory in the Ordered Phase of Helimagnets. https://doi.org/10.1103/physrevlett.97.267205

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