Week 1: Where is the resistance?

Where is the resistance? (Datta Ch. 1 and 4)

Each dot is an electron injected from the source. It moves at constant speed and can bounce backwards (elastic scattering, mean free path λ). Count how many reach the drain.

● moving toward the drain ● scattered back toward the source

Channel length L Mean free path λ Number of modes M Applied voltage V Animation speed

Electrons that reached the drain0 / 0

Transmission λ/(λ+L)–

Conductance G–

Current I = G·V–