Evidence for Majorana bound states in an iron-based superconductor
Author(s)Wang, Dongfei; Kong, Lingyuan; Fan, Peng; Chen, Hui; Zhu, Shiyu; Liu, Wenyao; Cao, Lu; Sun, Yujie; Du, Shixuan; Schneeloch, John; Zhong, Ruidan; Gu, Genda; Fu, Liang; Ding, Hong; Gao, Hong-Jun; ... Show more Show less
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The search for Majorana bound states (MBSs) has been fueled by the prospect of using their non-Abelian statistics for robust quantum computation. Two-dimensional superconducting topological materials have been predicted to host MBSs as zero-energy modes in vortex cores. By using scanning tunneling spectroscopy on the superconducting Dirac surface state of the iron-based superconductor FeTe[subscript 0.55]Se[subscript 0.45], we observed a sharp zero-bias peak inside a vortex core that does not split when moving away from the vortex center. The evolution of the peak under varying magnetic field, temperature, and tunneling barrier is consistent with the tunneling to a nearly pure MBS, separated from nontopological bound states. This observation offers a potential platform for realizing and manipulating MBSs at a relatively high temperature.
DepartmentMassachusetts Institute of Technology. Department of Physics
American Association for the Advancement of Science (AAAS)
Wang, Dongfei et al. “Evidence for Majorana Bound States in an Iron-Based Superconductor.” Science 362, 6412 (August 2018): 333–335 © 2017 The Author(s)
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