Currents in diodes are asymmetric with bias direction, a phenomenon known as nonreciprocal transport. Recently, diode behavior was realized in superconducting systems. I will discuss superconducting diode effects observed in Josephson junctions realized in an STM. Junctions of an elemental superconductor exhibit hysteretic behavior, typical of low-dissipation junctions, but no asymmetry. Nonreciprocal supercurrents emerge when inserting a single magnetic atom, with the preferred direction depending on atomic species. After describing the experiment, I will present a theory of Josephson diodes, relating asymmetries in switching and retrapping currents to different microscopic symmetry requirements and providing a microscopic understanding of experiment.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.