Thermal transfer enhancement by hydrodynamic plasmons in electron bilayers

Abstract

We develop a theory of heat transfer induced by thermal charge fluctuations in two-dimensional electron double layers. We consider pristine systems comprised of identical layers, and focus on the regime of sufficiently high temperatures and interlayer distances $d$, where the relevant charge fluctuations may be described using the hydrodynamic approach. In this limit heat transfer is dominated by the plasmon resonances. For systems with Galilean-invariant electron dispersion the interlayer thermal conductance $\varkappa$ is proportional to the kinematic viscosity of the electron liquid, and decreases as $1/d^4$. In the absence of Galilean invariance $\varkappa \propto \sigma /d^3$, where $\sigma$ is the intrinsic conductivity of the liquid. This strong enhancement can be traced to a drastically different broadening of plasmon resonances in systems with and without Galilean invariance.

9 pages, 5 figures

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Cited by in corpus (3)

• Transport signatures of plasmon fluctuations in electron hydrodynamics
• Near-field heat transfer and drag resistance in bilayers of composite fermions
• Dragging of electric current by hydrodynamic flow at charge neutrality