Publication
Physical Review B
Review

Nonlinear response of bound electrons to X rays

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Abstract

In the high-frequency limit, general expressions for second- and third-order induced electronic current densities in a medium are derived. These are valid for any medium with arbitrary spatial electronic-density variations. It is shown that the second-order current density at x-ray frequencies depends directly on the gradient of the unperturbed electronic density, so that it is sensitive to density variations both near the surface and near the ionic cores in a solid. © 1972 The American Physical Society.

Date

15 May 1972

Publication

Physical Review B

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