Extension of the Genkin and Mednis treatment for dynamic polarizabilities and hyperpolarizabilities of infinite periodic systems. I. Coupled perturbed Hartree–Fock theory

Abstract
The uncoupled theory of Genkin and Mednis [Sov. Phys. JETP 27, 609 (1968)] for the nonlinear optical properties of infinite periodic systems has been extended to yield a fully analytical coupled perturbed Hartree–Fock treatment. Similarities and differences from other approaches to the same problem are analyzed. Future addition of electron correlation and vibrational contributions is discussed.

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