Timeline for Is a superconductor 'perfect'? i.e. does current flow forever without decaying?
Current License: CC BY-SA 4.0
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| Aug 22, 2022 at 18:00 | history | edited | Stanislav Dolgopolov | CC BY-SA 4.0 |
the thermal distributions at low Tc are rather quantized than smooth, so thermal excitations are rather a few kT than much larger values.
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| Aug 22, 2022 at 17:42 | history | edited | Stanislav Dolgopolov | CC BY-SA 4.0 |
Answer to point 2 (couldn't some of the 'high' energy particles destroy the superconductivity briefly locally ?)
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| Aug 17, 2022 at 5:48 | comment | added | Stanislav Dolgopolov | Very good question. Indeed, there are two (thermal) energies: one splits the pair (say kT*), the second one breaks the Bose-Einstein-Condensation (say kTbec). In metals, usually, T*<Tbec, so the energy kT* splits the pairs at Tbec and there is no any BEC above T*. Above T* the pairs recombinate very fast, so the state is not a bosonic liquid, but rather a Fermi sea of free electrons. Thus, in superconducting metals kT* is the energy quant, breaking the supercurrent due to boson breaking. | |
| Aug 16, 2022 at 18:52 | comment | added | jp314 | but there is still thermal energy in the system (with a distribution) -- so can that occasionally split a pair ? would it recover ? | |
| Aug 16, 2022 at 16:50 | history | edited | Stanislav Dolgopolov | CC BY-SA 4.0 |
deleted 2 characters in body
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| Aug 16, 2022 at 16:48 | history | answered | Stanislav Dolgopolov | CC BY-SA 4.0 |