Hybrid superconductor-semiconductor double nanowire devices

Presenting author: Kasper Grove-Rasmussen, Co-authors: See references below.

We present some of our recent activities on hybrid superconductor-semiconductor double nanowire devices, which are of particular interest for studying phenomena related to sub-gap quantum states such as Yu-Shiba-Rusinov, Andreev and Majorana states. The double nanowire material system consists of two closely grown InAs nanowires covered by an in-situ metalized half/full (epitaxially matched) Al shell [1]. We show results transport measurements from three types of hybrid double nanowires devices: parallel double quantum dot Josephson junctions [2], Little-Parks devices [3] and superconducting islands [1] in which Yu-Shiba-Rusinov physics, critical current modulation and Coulomb blockade can be investigated.

 

[1] T. Kanne, D. Olsteins, M. Marnauza, A. Vekris, J. C. Estrada Saldaña, S. Loric, R. D. Schlosser, D. Ross, S. Csonka, K. Grove-Rasmussen, J. Nygård. “Double nanowires for hybrid quantum devices”., arXiv:2103.13938 (to appear in Advanced Functional materials (2021)).

 

[2] A. Vekris, J. C. Estrada Saldaña, T. Kanne, M. Marnauza, D. Olsteins, F. Fan, X. Li, T. Hvid-Olsen, X. Qiu, H.Q. Xu, J. Nygård, K. Grove-Rasmussen. “Josephson junctions in double nanowires bridged by in-situ deposited superconductors”, Phys. Rev. Research 3, 033240 (2021).

 

[3] A. Vekris, J. C. Estrada Saldaña, J. de Bruijckere, S. Lorìc, T. Kanne, M. Marnauza, D. Olsteins, J. Nygård, K. Grove-Rasmussen, “Asymmetric Little-Parks Oscillations in Full Shell Double Nanowires”, Scientific Reports 11, 19034 (2021).