Local Density Theory of Polarizability PDF

During the past decade the theoretical physics community has learned how to evaluate accurately polarizabilities and susceptibilities for many-electron systems such as atoms, solids, and liquids.

The most accurate numerical technique employs a method often called the Time-Dependent Local Density Approximation, which is abbreviated TDLDA.

The present volume is a review of recent research on the theory of po- larizabilities and susceptibilities.

Both authors have been doing these cal- culations. However, this review surveys the entire field, summarizing the research of many contributors.

The application of an external field, either ac or de, will induce a dipole moment which can be calculated and compared with experiment.

For mod- erately strong fields, both linear and nonlinear processes contribute to the moment.

We cover topics such as polarizability, hyperpolarizability, pho- toionization, phonons, and piezoelectricity.

Density functional theory in the Local Density Approximation (LDA) has been shown to be a very accurate method for calculating ground state prop- erties of electronic system.

For static external fields, the induced moments are properties of the ground state.

Then the calculation of the polarizability * is very accurate.

For ac fields, the moment is not part of the ground state.

However, the TDLDA methods are still very accurate.