Injection and shift currents become equivalent in linear-dispersion low-energy regimes, both governed by the same interband quantum-geometric dipole.
Wang,et al., Quantum-metric-induced nonlinear transport in a topological antiferromagnet.Nature621, 487 (2023)
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Emergent Quantum-Geometric Equivalence of Injection and Shift Currents
Injection and shift currents become equivalent in linear-dispersion low-energy regimes, both governed by the same interband quantum-geometric dipole.