Bulk effect and scaling behavior of Majorana Bound States in FeTe<sub>0.55</sub>Se<sub>0.45</sub>
ORAL
Abstract
Majorana bound states (MBS) can arise as quasi-particle excitations in vortex core of p-wave superconductors. Inspired by heterostructure proximity effect, Fu and Kane [1] proposed a realistic way to construct effective p-wave conditions with ordinary superconductor, which needs to induce full superconducting gap on non-degenerate Dirac surface states. Recently, we found a new platform (FeTe0.55Se0.45 single crystal) supporting pure Majorana-type excitations mimic Fu-Kane Model, which benefit from interband k-space proximity effect and strong correlation of materials. By combining ARPES [2] and STM [3] measurements, we, previously, established topological non-trivial properties and shown strong evidences of existence of MBS on vortex cores. In this talk, we will report temperature and tunneling barrier dependent measurements of MBS in FeTe0.55Se0.45, whose behaviors support Mojorana explanations. [1] L. Fu and C. L. Kane, Phys. Rev. Lett. 100, 096407 (2008) [2] P. Zhang et al., arXiv:1706.05163 (2017) [3] D.-F. Wang*, L.-Y. Kong*, P. Fan* et al., arXiv:1706.06074 (2017)
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Presenters
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Lingyuan Kong
- Institute of Physics, Chinese Academy of Sciences
- Institute of Physics,Chinese Academy of Scienes (CAS)