Massachusetts Institute of Technology

Juan Pedro Cascales Sandoval

Jagadeesh S Moodera

Yota Takamura

A switchable Josephson junction is provided that includes a plurality of ferromagnetic insulators that are defined by their respective magnetic alignments. A first superconducting layer that is positioned between any two of the ferromagnetic insulators, wherein the conductive state is controlled by the relative magnetization orientation of the ferromagnetic insulators where the first superconducting layer is superconducting when the two magnetizations are aligned in antiparallel but it turns normally conducting when the magnetic alignment is parallel. A second superconducting layer is adjacent one of the ferromagnetic layers, wherein Josephson tunneling occurs between the first superconducting layer and second superconducting layer across one of the ferromagnetic layers.

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Somerville, MA, United States of America

Juan Pedro Cascales Sandoval