Theory of π/2 superconducting Josephson junctions
A. Zyuzin, B. Spivak
DOI 10.1103/PhysRevB.61.5902 · Physical Review B
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Abstract
We consider theoretically a Josephson junction with a superconducting critical current density that has a random sign along the junction’s surface. We show that the ground state of the junction corresponds to the phase difference equal to π/2. Such a situation can take place in superconductor-ferromagnet-superconductor junctions.
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