In the thermal Frenkel-Kontorova chain, shear thinning and viscosity are set by energy drops at mechanical instabilities, not by thermally activated barrier crossing, so Eyring fits can be coincidental.
Here, V0 is of unit energy and q = 2 π/b is the wavenumber of the potential and b the period
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Finite-temperature properties of the Frenkel-Kontorova model: Relation to tribological systems and fluid rheology
In the thermal Frenkel-Kontorova chain, shear thinning and viscosity are set by energy drops at mechanical instabilities, not by thermally activated barrier crossing, so Eyring fits can be coincidental.