Dielectric function terms Links

Having estabUshed the connection between conductivity and dielectric function, we will next express the conductivity in terms of microscopic properties of the solid (the electronic wavefunctions and their energies and occupation numbers) as a final step, we will use the eonnection between conductivity and dielectric function to obtain an expression of the latter in terms of the microscopic properties of the solid. This will provide the direct link between the electronic structure at the microscopic level and the experimentally measured dielectric function, which captures the macroscopic response of the solid to an external electromagnetic field. 

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