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Superconductivity has attracted much attention in the field, not only due to its intriguing fundamental mechanism, but also its practical applications such as superconducting wires and detectors, as well as the potential applications including superconducting computing and logics. Though it’s been discovered more than a century ago, the novel phenomena based on superconductivity are still emerging. In this talk, I will introduce my research on the intriguing phenomena of superconductivity. First, I will discuss the superconducting diode effect, which describes the different positive and negative critical currents in a superconductor. We observed this effect with and without an external magnetic field in heterostructures based on van der Waals materials. The second phenomenon is the “global critical current effect”, which means that the critical current of a superconductor is not only dependent on its own properties but can be influenced or even determined by adjacent superconductors. Inspired by this observation, we designed a superconductor with a special geometry, in which we transferred the superconducting diode effect to another part of the superconductor that cannot manifest it on its own.

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Heng Wu, TU Delft
Seminar Room of the Institute of Physics II
Contact: Erwann/Matteo