Interference, diffraction, and diode effects in superconducting array in S-TI-S lateral Josephson junctions
ORAL
Abstract
It is a well-known phenomenon in optics that the spectroscopic resolution of a diffraction grating is much better compared to an interference device having just two slits, as in Young's double-slit experiment. On the other hand, it is well known that a classical superconducting quantum interference device (SQUID) is analogous to the optical double-slit experiment. Here we present experimental results and a model describing a superconducting analogue to the diffraction grating, namely an S-TI-S lateral Josephson junction array positioned on a topological insulator (TI) film Bi0.8Sb1.2Te3. Such devices exhibit a critical current peak that is much sharper than the analogous peak of an ordinary SQUID in the limit of an extremely weak field. They can be used as a sensitive absolute magnetic field sensors. They can also act as superconducting diodes due to their inherent asymmetry.
*The work was supported in part by the NSF DMR2104757 and by the NSF OMA-2016136 Quantum Leap Institute for Hybrid Quantum Architectures and Networks (HQAN). This project has also received funding from the European Union's Horizon 2020 research and innovation program under Grant Agreement No. 862660/QUANTUM E-LEAPS.
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Publication: https://arxiv.org/abs/2209.14266
Presenters
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Xiangyu Song
- University of Illinois at Urbana-Champaign
- University of Illinois at Urbana-Champai