All this superconductor business

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Discussion Overview

The discussion focuses on the mechanisms of current generation in superconductors, specifically exploring the Meissner effect, the behavior of Type 2 superconductors, and the implications of applying voltage across superconductors. It encompasses conceptual inquiries and technical explanations related to superconductivity.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant questions how currents arise in superconductors, specifically whether they are induced solely by placing the superconductor in a magnetic field, referencing the Meissner effect.
  • The same participant inquires about the effects of applying a voltage across a superconductor and seeks clarification on the behavior of Type 2 superconductors, noting their partial expulsion of magnetic fields and the presence of vortices.
  • Another participant provides a link to a resource, suggesting it may help clarify some concepts related to superconductors.
  • A different participant expresses a personal interest in superconductors and mentions ongoing challenges in visualizing the concept of Cooper pairs.

Areas of Agreement / Disagreement

The discussion does not appear to reach a consensus, as participants express varying levels of understanding and pose different questions regarding superconductors, indicating multiple competing views and uncertainties.

Contextual Notes

Participants have not resolved specific assumptions regarding the mechanisms of current generation or the behavior of Type 2 superconductors, and there are unresolved questions about the implications of applying voltage.

Who May Find This Useful

This discussion may be useful for individuals interested in superconductivity, including students considering studying the field, as well as those seeking to clarify foundational concepts related to superconductors.

Crumbles
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I am new to superconductors and how they work. :confused:

Could anybody maybe explain how currents actually arise in a superconductor? Is it just by placing the superconductor in a B-field that causes a current due to the expulsion of the external field (Messiner Effect)?

If so, is that the only way of getting a current to pass through a superconductor? What would happen if you actually applied a voltage across the superconductor?

And what is with the Type 2 superconductors? :eek: From what I have been reading, they do not fully undergo the Messiner effect but repell exernal fields while still having some lines of field inside which are called vortices. Is that correct? Why does this actually happen? :confused:

-Crumbles- :rolleyes:
 
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Crumbles said:
I am new to superconductors and how they work. :confused:

Could anybody maybe explain how currents actually arise in a superconductor? Is it just by placing the superconductor in a B-field that causes a current due to the expulsion of the external field (Messiner Effect)?

If so, is that the only way of getting a current to pass through a superconductor? What would happen if you actually applied a voltage across the superconductor?

And what is with the Type 2 superconductors? :eek: From what I have been reading, they do not fully undergo the Messiner effect but repell exernal fields while still having some lines of field inside which are called vortices. Is that correct? Why does this actually happen? :confused:

-Crumbles- :rolleyes:


http://www.ornl.gov/info/reports/m/ornlm3063r1/preface.html

You may also want to do a search on messages already posted on this forum. There have been tons of stuff already discussed on this topic.

Zz.
 
Last edited by a moderator:
Thanks for that link ZapperZ. Things sort of make a bit more sense now. :smile:
 
http://superconductors.org

Best site for superconductors. Superconductors are one of the fields I'm serious about possibly studying when I go to college so I try to learn as much as possible about them. I've been reading about them for quite awhile, but I still have trouble visualizing cooper pairs in my head.
 

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