Electrical behavior of thin films of ITO and SnO2

The thin films of conducting ITO and SnO2

behave like traditional conductors below

their plasmon frequency.

Ashcroft and Mermin

Solid State Physics

For e(w) > 0 : insulator, transparent

For e(w) < 0 : conductor, reflecting

For ITO wp ~ 9000 cm-1

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