Nearly quantized conductance plateau of vortex zero mode in an iron-based superconductor
Name
1904.06124.pdf
Description
Accepted version
Size
2.15 MB
Format
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Checksum (MD5)
2ba296f794502968d6cc25f19f57e56d
Author(s)
Zhu, Shiyu
Kong, Lingyuan
Cao, Lu
Chen, Hui
Papaj, Michal
Du, Shixuan
Xing, Yuqing
Liu, Wenyao
Wang, Dongfei
Shen, Chengmin
Date Issued
December 2019
Journal
Science
Publisher
American Association for the Advancement of Science (AAAS)
Citation
Zhu, Shiyu et al. "Nearly quantized conductance plateau of vortex zero mode in an iron-based superconductor." Science 367, 6474: 189-192 © 2020 American Association for the Advancement of Science
Version
Author's final manuscript
Abstract
Majorana zero modes (MZMs) are spatially localized, zero-energy fractional quasiparticles with non-Abelian braiding statistics that hold promise for topological quantum computing. Owing to the particle-antiparticle equivalence, MZMs exhibit quantized conductance at low temperature. By using variable-tunnel-coupled scanning tunneling spectroscopy, we studied tunneling conductance of vortex bound states on FeTe0.55Se0.45 superconductors. 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
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1126/science.aax0274
