![]() To the best of our knowledge, how to justify or reconcile these contradictions is still an open question. Unfortunately, when we resort to the London equations which are widely believed to be correct for ideal superconductors, we find that the longitudinal electrostatic field has to be zero immediately inside a superconductor, which means that the penetration depth must be zero. However, in recent years, some theories and experiments suggested that the longitudinal electric field is screened by λ L rather than λ TF, challenging the community. Then, how about the longitudinal electric field screening in superconductors? It is commonly believed to be still governed by λ TF. The former is governed by the Thomas–Fermi screening length λ TF, while the latter is by the London penetration depth λ L. For example, a metal can screen the longitudinal electrostatic field called electrostatic shielding, while a superconductor can screen the transverse magnetostatic field called the Meissner effect. Electromagnetic fields can be screened by materials as a result of field–matter interactions.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |