Journal of Low Temperature Physics

, Volume 191, Issue 3–4, pp 123–135 | Cite as

Conductivity of Weakly Disordered Metals Close to a “Ferromagnetic” Quantum Critical Point

  • George Kastrinakis


We calculate analytically the conductivity of weakly disordered metals close to a “ferromagnetic” quantum critical point in the low-temperature regime. Ferromagnetic in the sense that the effective carrier potential \(V(q,\omega )\), due to critical fluctuations, is peaked at zero momentum \(q=0\). Vertex corrections, due to both critical fluctuations and impurity scattering, are explicitly considered. We find that only the vertex corrections due to impurity scattering, combined with the self-energy, generate appreciable effects as a function of the temperature T and the control parameter a, which measures the proximity to the critical point. Our results are consistent with resistivity experiments in several materials displaying typical Fermi liquid behaviour, but with a diverging prefactor of the \(T^2\) term for small a.


Conductivity calculation Vertex corrections Quantum critical point Fermi liquid Weak disorder 


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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Institute of Electronic Structure and Laser (IESL)Foundation for Research and Technology - Hellas (FORTH)IraklioGreece

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