Topological Superconductor and Majorana Zero Mode in the Vortex

  • [2019-05-16]

    Speaker:

    Prof. JIA Jinfeng
    Shanghai Jiao Tong University

    Time:

    2019-05-22  14:00

    Place:

    Exhibition Hall, Hefei National Laboratory Building

    Detail:

    Abstract:

      Majorana zero mode (MZM) can be used in fault-tolerant quantum computation relying on their non-Abelian braiding statistics, therefore, lots of efforts have been made to find them. Signatures of the MZM have been reported as zero energy modes in various systems. As predicted, MZM in the vortex of a topological superconductor appears as a zero energy mode with a cone like spatial distribution. Also, MZM can induce spin selective Andreev reflection (SSAR), a novel magnetic property which can be used to detect the MZM.Here, I will show you that the Bi2Te3/NbSe2 hetero-structure is an artificial topological superconductor and all the three features are observed for the MZM inside the vortices on the Bi2Te3/NbSe2. Especially, by using spin-polarized scanning tunneling microscopy/spectroscopy (STM/STS), we observed the spin dependent tunneling effect, which is a direct evidence for the SSAR from MZM, and fully supported by theoretical analyses. More importantly, all evidences are self-consistent. Our work provides definitive evidences of MZM and will stimulate the MZM research on their novel physical properties, hence a step towards their statistics and application in quantum computing.

    References:

    1. M. X. Wang, et al., Science 336, 52-55 (2012).

    2. J. P. Xu, et al., Phys. Rev. Lett. 112, 217001 (2014).

    3. J. P. Xu, et al., Phys. Rev. Lett. 114, 017001 (2015).

    4. H. H Sun, et al.,Phys. Rev. Lett. 116, 257003 (2016).

    5. H. H. Sun, Jin-Feng Jia, NPJ Quan. Mater. 2, 34 (2017).


    Organizer:

    Hefei National Laboratory for Physical Sciences at the Microscale



  • MORE NEWS

HIGHLIGHT

Highlight of USTC

According to the latest Nature Publishing Index (NPI) Asia-Pacific and The Nature Publishing Index China, University of Science and Technology of China tops in Chinese universities again. The rankings are based on the number of papers that were published in Nature journals during the last 12 months.

Highlight

This article came from News Center of USTC.