Hall effect arises whenever a magnetic field is applied to a conductor or semiconductor. As a result a Hall voltage is registered across the given specimen. With the same token, does this effect arise in a superconductor? If yes, how big is it (compared with a conductor)?
Dear Arbab,
superconductors repel the magnetic field entirely (type 1 superconductors and type 2 ones at low magnetic field values) apart from a thin layer at the surface - the London penetration depth. The Meissner effect is beautiful demonstration of the phenomenon.
No magnetic field - no the Hall effect.
Best regards,
Roman
I agree with Roman. I have been following an independent researcher that believes that superconductivity is a result of low permeability of a material. He predicted that Bismuth would act as a semi-conductor at very low temperatures. It turns out, he is correct. http://www.sciencealert.com/bismuth-is-a-superconductor-but-it-goes-against-our-current-understanding-of-the-phenomenon
No magnetic field = no Hall effect
Well it is obvious that superconductors are perfect diamagnets, such that it would not allow any magnetic field in it. So you cannot measure any hall phenomenon. Secondly, even it allows marginal field, as in case of type II, electrons being possessing the bandgap (cooper pairs) does not get influenced by this field. If applied field is too strong, cooper pair breaks, you can measure hall effect, but your sample will be in normal conducting state.
Due to perfect diamagnetic behaviour of supperconductors (type-I), there will be no magnetic field inside the superconductor so charge separation will not exist and no hall effect. For type-II superconductor very small magnetic field will exist. So no hall effect for superconductors.
Hello Shibddaling,
what about the temperature of the Hall coefficient measurements in the cited paper?
I don't think that copper and lead sulphides have been studied at helium temperatures (below 4.2 K).
As critical current density is very high in HTSC, it is possible to measure Hall effect though carrier density is low. HTSC samples allow magnetic field to penetration through.
as conductivity is inversly propertional to hall voltage .so it exist lesser as compared to metals
Prof. A. I. Arbab
There are new experimental technics that seem to be able to find the current density due to the Hall effect (density of normal carriers, not supercarriers) in unconventional superconductors around the nodes (i. e. regions where the scattering of fermions is relevant).
Please there are new references on what low-temperature experimental researchers found, I attach to this post some blogs where they explain the novel exp. findings, this is an interesting question this 2021 year, thank you.
https://www.ru.nl/hfml/research/research-highlights/highlights/electrons-go-missing-strange-metal-phase-high/
https://physicsworld.com/a/superconductivity-and-quantum-hall-effect-coexist-in-novel-nitride-material/
Best Regards.
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