Lecture 1B: What and where is the resistance?
| Category | Online Presentations |
|---|---|
| Abstract | 
Objective: To introduce a simple quantitative model that highlights the essential parameters that determine electrical conduction: the density of states in the channel, D and the rates at which electrons hop in and out of the two contacts, labeled source and drain. This model is used to explain diverse phenomena such as (1) why a small conductor has a maximum conductance that it cannot exceed even with the best of contacts, (2) how this conductance quantum evolves into Ohm’s law for large conductors, (3) how even a hydrogen atom can exhibit thermoelectric effects, (4) how even symmetric devices can be rectifying due to asymmetric electrostatics, and (5) how the “voltage” varies spatially inside a nanoscale device.
This lecture is part 2 of 2. |
| Sponsored by |
NCN@Purdue Summer School 2008 |
| Cite this work | Researchers should cite this work as follows: |
| Time | 01:30 PM, July 14, 2008 |
| Location | Purdue University, West Lafayette, IN |
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