Zero-field superconducting diode effect in graphene moiré systems

Mathias S. Scheurer; Sayan Banerjee; Harley Scammell; Jia Li; Jiangxiazi Lin

doi:10.1117/12.2677511

28 September 2023 Zero-field superconducting diode effect in graphene moiré systems

Mathias S. Scheurer, Sayan Banerjee, Harley Scammell, Jia Li, Jiangxiazi Lin

Proceedings Volume PC12656, Spintronics XVI; PC1265618 (2023) https://doi.org/10.1117/12.2677511
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States

Abstract

Recent experiments [Nature Physics 18, 1221 (2022)] revealed a superconducting diode effect in twisted trilayer graphene in the absence of external magnetic fields and with very large critical current asymmetry. In this talk, I will discuss possible microscopic theoretical explanations for this observation. We will see that the observed phenomenology crucially constrains the microscopic physics of graphene moiré systems. I will also discuss why a diode effect based on spontaneous time-reversal-symmetry breaking might reach higher critical current asymmetries than a diode effect resulting from breaking time-reversal symmetry explicitly by a magnetic field.

Conference Presentation

Citation Download Citation

Mathias S. Scheurer, Sayan Banerjee, Harley Scammell, Jia Li, and Jiangxiazi Lin "Zero-field superconducting diode effect in graphene moiré systems", Proc. SPIE PC12656, Spintronics XVI, PC1265618 (28 September 2023); https://doi.org/10.1117/12.2677511

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