TITLE: Hybrid superconducting nanostructures: From transport to quantum devices
AUTHOR: Eduardo J. H. Lee (IFIMAC, UAM)
WHEN: March, 12 - 12PM
WHERE: Salón de Actos, ICMM
ABSTRACT: Hybrid Josephson junctions based on low-dimensional materials provide a versatile platform to explore mesoscopic superconductivity and proximity effects. In this talk, I will discuss our work on superconducting devices incorporating InAs nanostructures or 2D materials, such as NbSe2. Using dc transport measurements, we study proximity-related phenomena in these systems, revealing, for example, a strong impact of the electrical leads in InAs-Al nanowires due to the inverse proximity effect, associated with the emergence of an anomalous metallic phase [1]. I will also present transport experiments on NbSe₂/NiPS₃ junctions, where we observe signatures of localized transport channels that point to an interplay between superconductivity and antiferromagnetic order [2]. In the final part of the talk, I will show how embedding hybrid junctions into microwave circuits allows us to complement transport-based studies with microwave spectroscopy, and to extend them to the coherent regime, illustrated by the realization of an InAs–Al nanowire gatemon in the ultrastrong coupling limit [3]. Together, these results reinforce the potential of combining transport and microwave techniques for exploring superconductivity in low-dimensional materials.
[1] Oliveira et al., arXiv: 2512.02828.
[2] Gonzalez-Sanchez et al., Adv. Mater., https://doi.org/10.1002/adma.202521250
[3] Casal Iglesias et al., in preparation.
