Table 1.

Model parameters used to fit data of Devices 1 and 2 in Figs. 2 and 3.

Device	$\xi$ (nm)	$A_{\perp }$ (${\text{nm}}^2$)	$A_{\Vert }$ (${\text{nm}}^2$)	$t_{\mathrm{s}}/d^{\ast }$
1	66	18,000	7100	0.131
2	81	23,080	5718	0.1

From left to right, coherence length ($\xi$), effective perpendicular flux parameter ($A_{\perp }$), effective parallel flux area ($A_{\Vert }$), and ratio of shell thickness ($t_{\mathrm{s}}$) to effective single cylinder diameter ($d^{\ast }$). For parameter extraction methods, see Methods.