Jun 20 – 23, 2022
Max Planck Institut für Festkörperforschung
Europe/Berlin timezone

Zero-field superconducting diode effect in twisted trilayer graphene

Jun 20, 2022, 5:30 PM
2D5 (Max Planck Institut für Festkörperforschung)


Max Planck Institut für Festkörperforschung

Contributed Poster Poster Session


Mathias Scheurer (UIBK)


The semiconducting diode, which is characterized by a highly asymmetric current-voltage relation, is central to modern-day electronics. In the last few years, its superconducting analogue – a system that behaves like a superconductor for current flow in one direction but exhibits finite resistance when the current direction is reversed – has attracted attention in the physics community, due to its potential for future quantum-electronics applications. So far, this behavior has only been realized in the presence of a magnetic field, magnetic junction or magnetic proximity, and is typically rather weak in the sense that it exhibits the superconducting diode effect only for a small range of applied current.
In this talk, I will present experimental evidence and a microscopic theory for a strong superconducting diode effect at zero external magnetic in twisted trilayer graphene [1-3]. After a brief introduction to the rich physics of twisted trilayer graphene close to the magic angle, I will discuss why this is a natural system to realize this exotic superconducting behavior as an intrinsic property and illustrate the intricate underlying microscopic physics.

[1] Siriviboon, Lin, Scammell, Liu, Rhodes, Watanabe, Taniguchi, Hone, MS, Li, arXiv:2112.09115.
[2] Lin, Siriviboon, Scammell, Liu, Rhodes, Watanabe, Taniguchi, Hone, MS, Li, and arXiv:2212.07841.
[3] Scammell, Li, MS, arXiv:2112.09115.

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