Targeted modifications of monolithic multiterminal superconducting weak-links.

Autor:	Collienne S; Experimental Physics of Nanostructured Materials, Q-MAT, CESAM, Université de Liège, B-4000 Sart Tilman, Belgium. scollienne@uliege.be., Majidi D; Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, 38000 Grenoble, France., Van de Vondel J; Quantum Solid-State Physics, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium., Winkelmann CB; Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, 38000 Grenoble, France., Silhanek AV; Experimental Physics of Nanostructured Materials, Q-MAT, CESAM, Université de Liège, B-4000 Sart Tilman, Belgium. scollienne@uliege.be.
Jazyk:	angličtina
Zdroj:	Nanoscale [Nanoscale] 2022 Apr 07; Vol. 14 (14), pp. 5425-5429. Date of Electronic Publication: 2022 Apr 07.
DOI:	10.1039/d2nr00026a
Abstrakt:	In a multi-branch metallic interconnect we demonstrate the possibility to induce targeted modifications of the material properties by properly selecting the intensity and polarity of the applied current. We illustrate this effect in Y-shape multiterminal devices made of Nb on sapphire for which we show that the superconducting critical current can be lowered in a controlled manner at a preselected junction. We further observe the gradual appearance of Fraunhofer-like critical current oscillations with magnetic field which indicates the gradual modification of a superconducting weak link. This method permits progressive modifications of a hand-picked junction without affecting the neighboring terminals. The proposed approach has the benefit of being inexpensive and requiring conventional electronics. This technique represents a major step toward all-electric control of multiterminal Josephson junctions.
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu