Nearly quantized conductance plateau of vortex zero mode in an iron-based superconductor

We report observations of conductance plateaus as a function of tunnel coupling for zero-energy vortex bound states with values close to or even reaching the 2e2/h quantum conductance (where e is the electron charge and h is Planck’s constant). By contrast, no plateaus were observed on either finite energy vortex bound states or in the continuum of electronic states outside the superconducting gap. This behavior of the zero-mode conductance supports the existence of MZMs in FeTe0.55Se0.45.

Source: ScienceNOW - January 8, 2020 Category: Science Authors: Zhu, S., Kong, L., Cao, L., Chen, H., Papaj, M., Du, S., Xing, Y., Liu, W., Wang, D., Shen, C., Yang, F., Schneeloch, J., Zhong, R., Gu, G., Fu, L., Zhang, Y.-Y., Ding, H., Gao, H.-J. Tags: Physics reports Source Type: news