Volume 81, Number 6, March 2008
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||28 February 2008|
Spin Meissner effect in superconductors and the origin of the Meissner effect
Department of Physics, University of California, San Diego - La Jolla, CA 92093-0319, USA
Accepted: 30 January 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 of the surface of superconductors in the absence of applied external fields, with carrier density = the superfluid density and carrier speed ( bare electron mass). The two members of a Cooper pair circulate in orbits of radius in opposite direction and the spin current in a Cooper pair has orbital angular momentum . Our description also provides a “geometric” interpretation of the difference between type-I and type-II superconductors.
PACS: 74.20.-z – Theories and models of superconducting state / 74.20.Mn – Nonconventional mechanisms (spin fluctuations, polarons and bipolarons, resonating valence bond model, anyon mechanism, marginal Fermi liquid, Luttinger liquid, etc.) / 71.70.Ej – Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect
© EPLA, 2008
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