Corrections address angular momentum conservation in superconductors, implying understanding of the Meissner effect.
In Hirsch (2008J. Phys.: Condens. Matter20235233), it was pointed out that the Meissner effect in superconductors raises an important question that had not been-nor has been to date-addressed within conventional BCS theory: how is angular momentum conserved? The paper proposed two different solutions to this puzzle. Both require important corrections, that we discuss here.
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J E Hirsch (2026) studied this question.
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