Third-order photoconductivities in d-wave altermagnets are determined solely by quantum metric and connection, with closed-form solutions when delta-bond hopping vanishes and perturbative solutions otherwise, verified numerically.
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Third-order optical response in d-wave altermagnets: Analytical and numerical results from microscopic model
Third-order photoconductivities in d-wave altermagnets are determined solely by quantum metric and connection, with closed-form solutions when delta-bond hopping vanishes and perturbative solutions otherwise, verified numerically.