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Strong non-linear response of strange metals

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arxiv 2403.00062 v4 pith:HZLE7AL5 submitted 2024-02-29 cond-mat.str-el

Serhii Kryhin , Subir Sachdev , Pavel A. Volkov This is my paper · ORCID
classification cond-mat.str-el
keywords metalsstrangefermistrongcharacterizeconductanceconductivitycontains
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abstract

We show that nonlinear transport responses in strange metals are strong, larger by a factor of $E_F/T$ than in Fermi liquids. Within the two-dimensional Yukawa-Sachdev-Ye-Kitaev model of a Fermi surface with a spatially random coupling to a critical scalar, the third order conductivity is found to diverge as $1/T$ at low $T$, indicating the existence of a voltage-temperature scaling regime in the conductance. Its frequency and orientation dependence contains information on relaxation times of heat and electron distribution deformations, providing a new set of tools to characterize strange metals.

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Cited by 1 Pith paper

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  1. The foot, the fan, and the cuprate phase diagram: Fermi-volume-changing quantum phase transitions

    cond-mat.str-el 2025-01 conditional novelty 3.0 of 10

    The paper attributes the cuprate 'foot' to a disordered spin-density-wave transition and the 'fan' to a disorder-tuned FL-to-FL* Fermi-volume-changing transition described by a two-dimensional Yukawa-SYK model.

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