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Dynamics of the normal-superconductor phase transition and the puzzle of the Meissner effect | J. E. Hirsch
; | Date: |
20 Apr 2015 | Abstract: | The analisis of Pippard cite{pip} for the growth of the normal phase into
the superconducting phase in the presence of a magnetic field $H>H_c$ is
applied in reverse to the case $H<H_c$ ($H_c=$critical magnetic field). As the
superconducting phase grows into the normal phase, a supercurrent is generated
at the superconductor-normal phase boundary that flows in direction opposite to
the Faraday electric field resulting from the moving phase boundary. This
supercurrent motion is in direction opposite to what is dictated by the Lorentz
force on the current carriers, and in addition requires that mechanical
momentum of opposite sign be tranferred to the system as a whole to ensure
momentum conservation. We argue that the conventional BCS-London theory of
superconductivity cannot explain these facts, and that as a consequence the
Meissner effect remains unexplained within the conventional theory of
superconductivity. We propose that the Meissner effect can only be understood
by assuming that there is {motion of charge in direction perpendicular to the
normal-superconductor phase boundary} and point out that the unconventional
theory of hole superconductivity describes this physics. | Source: | arXiv, 1504.5190 | Services: | Forum | Review | PDF | Favorites |
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