Nonperturbative nonequilibrium Green's function framework computes nonlinear Hall response in strong dc fields for a two-band semimetal, showing DMFT interactions substantially alter the signal beyond perturbative regimes.
Semiclassical theory of the photogalvanic effect in non-centrosymmetric systems
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abstract
We develop a semiclassical theory of nonlinear transport and the photogalvanic effect in non-centrosymmetric media. We show that terms in semiclassical kinetic equations for electron motion which are associated with the Berry curvature and side jumps give rise to a dc current quadratic in the amplitude of the ac electric field. We demonstrate that the circular photogalvanic effect is governed by these terms in contrast to the linear photogalvanic effect and nonlinear I-V characteristics which are governed mainly by the skew scattering mechanism. In addition, the Berry curvature contribution to the magnetic-field induced photogalvanic effect is calculated.
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UNVERDICTED 5representative citing papers
Derives gauge-invariant decomposition of second-order dc nonlinear conductivity into nonlinear Drude (τ²), Berry-curvature-dipole (τ), and intra/interband quantum-metric-dipole (τ⁰) responses in velocity-gauge Keldysh formalism for tight-binding systems.
The authors derive and analyze the second-order electric-field contributions to current in topological Dirac semimetals with parallel magnetic field, focusing on Berry curvature dipole and field-induced terms, and propose experimental tests via anomalous Hall resistivity in specific materials.
Nonlinear thermal and thermoelectric responses are shown to encode quantum geometry and satisfy relations parallel to the Wiedemann-Franz and Mott laws in systems with broken symmetries.
A giant cyclotron resonance with polarity-switching peak is predicted in the nonlinear valley Hall photocurrent of inversion-asymmetric 2D semiconductors via skew scattering in a two-band model under THz and magnetic fields.
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Nonperturbative Nonlinear Hall Effect in Nonequilibrium Steady States
Nonperturbative nonequilibrium Green's function framework computes nonlinear Hall response in strong dc fields for a two-band semimetal, showing DMFT interactions substantially alter the signal beyond perturbative regimes.