Giant nonlinear conductivity in 2D electron gas from substrate-induced dipolar scattering

Dmitry V. Chichinadze; Alexander Seidel; Zohar Nussinov

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arXiv · 2605.20699

Giant nonlinear conductivity in 2D electron gas from substrate-induced dipolar scattering

Dmitry V. Chichinadze·Alexander Seidel·Zohar Nussinov

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Abstract

Despite a surge of interest in the nonlinear transport in 2D materials, a fundamental puzzle remains: existing theoretical frameworks are unable to quantitatively account for the giant nonlinear conductivities ($\gtrsim 1 \frac{\mu \text{m}}{\Omega \text{V}}$) recently reported in 2D van der Waals heterostructures. Here, we introduce a mechanism based on electron scattering from a substrate-induced dipole array linked to short-range impurities. We show that the strict kinematic constraints, inherent to 2D scattering, lead to a singular enhancement of the nonlinear response, fundamentally dictating a natural scale of $1 \frac{\mu \text{m}}{\Omega \text{V}}$.

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Dmitry V. Chichinadze, Alexander Seidel, Zohar Nussinov. 2026-05-20. Giant nonlinear conductivity in 2D electron gas from substrate-induced dipolar scattering. https://arxiv.org/abs/2605.20699

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