Tunable Josephson diode effect on the surface of topological insulators
arXiv:2211.10572 · doi:10.1103/PhysRevLett.131.096001
Abstract
The Josephson rectification effect, where the resistance is finite in one direction while zero in the other, has been recently realized experimentally. The resulting Josephson diode has many potential applications on superconducting devices, including quantum computers. Here, we theoretically show that a superconductor-normal metal-superconductor Josephson junction diode on the two-dimensional surface of a topological insulator has large tunability. The magnitude and sign of the diode quality factor strongly depend on the external magnetic field, gate voltage, and the length of the junction. Such rich properties stem from the interplay between different current-phase relations for the multiple transverse transport channels, and can be used for designing realistic superconducting diode devices.
arXiv comment7 pages, 5 figures
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- Enhancing the Josephson diode effect with Majorana bound states
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