What Does 'Superconducting Instability' Mean?

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Discussion Overview

The discussion centers around the concept of 'Superconducting instability,' particularly in the context of the BCS phase transition in a Fermi system with attractive interactions. Participants seek clarification on the term and its implications in various situations.

Discussion Character

  • Exploratory, Conceptual clarification

Main Points Raised

  • One participant requests an explanation of 'Superconducting instability' and references the need for context due to its varied usage.
  • Another participant acknowledges the vagueness of the initial question and specifies their interest in the term as it relates to BCS phase transitions.
  • A later reply suggests that 'Superconducting instability' indicates that pair formation cannot occur above a critical temperature in a dense limit.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the definition of 'Superconducting instability,' and multiple interpretations are acknowledged.

Contextual Notes

The discussion highlights the importance of context when discussing terms like 'Superconducting instability,' as it is used in various scenarios within superconductivity.

HJ_original
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Could anyone please explain what 'Superconducting instability' means?

If there are some good references to read, that would be really nice!
 
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HJ_original said:
Could anyone please explain what 'Superconducting instability' means?

If there are some good references to read, that would be really nice!

This is very vague. You need to frame your question with the context that you want. Superconducting instability is used in many different situations.

Again, as stated in the PF Rules, you must provide as clear of a question as possible. If not, we will be rambling on for several posts just to figure out what exactly it is what you want.

Zz.
 
I am sorry if my question was vague. I didn't know that Superconducting instability is used in many other situations.

I was reading the article 'Bose Condensation in an Attractive Fermion Gas'
http://www.springerlink.com/content/n200841124207n14/fulltext.pdf

and I got stuck with this word 'superconducting instability' at the 2nd line in the Introduction part. I googled it first, but couldn't easily find a good overall explanation for it.

So.. If I rephrase my question, I'd like to know what 'Superconducting instability' means in the context of BCS Phase transition in Fermi system, interacting with attractive forces.

HJ
 
well,, now I see that 'Superconducting instability' just means that the formation of the pair cannot happen above the critical temperature in a dense limit..

Thanks anyway.

HJ
 

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