Discussion Overview
The discussion centers on the effects of resistor size on the temperature coefficient of resistivity (alpha), particularly in the context of resistors that shrink to the nanoscale. Participants explore whether alpha, typically considered a material constant for bulk resistors, changes with dimensions such as cross-sectional area.
Discussion Character
Main Points Raised
- One participant seeks references on how resistor size affects alpha, questioning if it changes as dimensions approach tens of nanometers.
- Some participants assert that alpha is a material constant that remains independent of dimensions.
- Another participant references literature suggesting a different conclusion, indicating that alpha may depend on physical dimensions.
- A participant notes that an article discusses resistivity in thin films and mentions surface roughness, interpreting this as a "virtual thickness" parameter rather than a change in bulk resistivity.
- One participant speculates that differences in surface and grain effects on electron scattering could influence alpha based on size parameters like surface:volume ratio.
- Another participant offers to share access to the referenced article, indicating a willingness to facilitate further discussion.
Areas of Agreement / Disagreement
Participants express differing views on whether alpha is affected by the dimensions of the resistor, with some asserting it is constant while others suggest potential dependence on size. The discussion remains unresolved.
Contextual Notes
Participants reference literature and theories, such as the Fuchs-Sondheimer theory, but there are limitations in accessing some sources and a lack of consensus on the interpretation of findings related to alpha and size effects.