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Planckian Dissipation in Metals

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arxiv 2107.07802 v3 pith:BRFPHYRV submitted 2021-07-16 cond-mat.str-el hep-th

Sean A. Hartnoll , Andrew P. Mackenzie This is my paper · ORCID
classification cond-mat.str-elhep-th
keywords planckianmany-bodymetalsdifferentdissipationquasiparticleappearancearise
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We review the appearance of the Planckian time $\tau_\text{Pl} = \hbar/(k_B T)$ in both conventional and unconventional metals. We give a pedagogical discussion of the various different timescales (quasiparticle, transport, many-body) that characterize metals, emphasizing conditions under which these times are the same or different. Throughout, we have attempted to clear up aspects of the problem that had been confusing us, in the hope that this helps the reader as well. We discuss the possibility of a Planckian bound on dissipation from both a quasiparticle and a many-body perspective. Planckian quasiparticles can arise naturally from a combination of inelastic scattering and mass renormalization. Many-body dynamics, on the other hand, is constrained by the basic time- and length- scales of local thermalization.

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Cited by 5 Pith papers

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