[15a-W9_325-1~8] 11.1 Fundamental properties

10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)English Presentation

[15a-W9_325-4] Little-parks effect in full-shell GaAs/InAs core/shell nanowire Josephson junctions

〇Russell Stewart Deacon¹, Farah Basaric², Alexander Pawlis², Thomas Schapers², Koji Ishibashi¹ (1.Center for Emergent Matter Science (CEMS), RIKEN, 2.Forschungszentrum Julich)

Keywords:

nanowire,Josephson junction

Here we study Josephson junctions formed from a GaAs/InAs core/shell nanowire with a full-shell of epitaxially deposited Aluminium. We observe the destructive Little-Parks effect when magnetic flux is threaded through the nanowire, indicating the winding of the superconducting phase of the order parameter. Furthermore we observed a pronounced skewing of the peak supercurrent to higher magnetic fields in the lobes of the Little-Parks oscillations. The skewed critical current can be attributed to the characteristics of the unique Andreev bound states of the full-shell nanowire system which are an analog of Caroli-de Gennes-Matricon states seen in Abrikosov vortex lines of type-II superconductors.