Extended Data Fig. 4: Emergent inductance for various devices with different size and electrode materials.

a–f, Scanning electron microscope images for devices with different sizes and electrode materials. The electrode material is tungsten, except for device 4 in which it is gold. g–k, Magnetic-field dependence of the imaginary part of the background-subtracted impedance (Im ΔZ^1f) in thin-plate devices with W electrodes. The green, pink, blue and light blue shading represents H, Sk, TC and fan phases, respectively. l, Magnetic-field dependence of the imaginary part of the complex impedance Im ΔZ^1f in a thin-plate device with gold electrodes. m, The magnitude of Im ΔZ^1f as a function of the distance of the voltage electrodes (d_electrode). The definition of d_electrode is shown in the inset. Here, the cross-sectional area is the same for all devices shown in m.