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Spin Meissner Effect in Superconductors and the Origin of the Meissner Effect

arXiv:0710.0876
(Los Alamos),
Europhys. Lett. 81, 67003 (2008).
We propose a dynamical explanation of the Meissner effect in superconductors and predict the existence of a spin Meissner effect:
that a macroscopic spin current flows within a London penetration depth $\lambda_L$ of the surface of superconductors in the absence of
applied external fields, with carrier density = the superfluid density and carrier speed $v=\hbar/(4m_e\lambda_L$) ($m_e=$bare
electron mass). The two members of a Cooper pair circulate in orbits of radius $2\lambda_L$ in opposite direction and
the spin current in a Cooper pair has
orbital angular momentum $\hbar$. Our description also provides a 'geometric' interpretation of the difference between type I and type II superconductors.

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