Search for Majorana Quasiparticles in Topological Superconductors Using Scanning Tunneling Microscope

• MACHIDA Tadashi

  Center for Emergent Matter Science, RIKEN Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency (JST)

Bibliographic Information

Other Title

• 超低温走査型トンネル顕微鏡を用いたトポロジカル超伝導体におけるマヨラナ準粒子探索
• チョウテイオン ソウサガタ トンネル ケンビキョウ オ モチイタ トポロジカル チョウデンドウタイ ニ オケル マヨラナ ジュンリュウシ タンサク

Abstract

We have systematically examined a large number of vortices in the topological superconductor Fe(Se,Te), using a dilution-refrigerator scanning tunneling microscope. We found that a certain number of vortices possess the zero energy vortex bound state (ZVBS) below 20 µeV suggesting its Majorana bound-state origin, but others do not. Interestingly, the emergence of the ZVBS is not related to the preexisting chemical and electronic disorders, and the fraction of vortices with the ZVBS systematically decreases with increasing magnetic field, suggesting the importance of the inter-vortex interaction. These results provide an important insight into a way to control Majorana quasiparticles for future applications.

Journal

• Vacuum and Surface Science

  Vacuum and Surface Science 65 (2), 53-58, 2022-02-10

  The Japan Society of Vacuum and Surface Science

Keywords

• Majorana particle
• topological superconductor
• scanning tunneling microscope

Details

• CRID: 1390009640061508352
• NII Article ID: 130008159249
• NII Book ID: AA12808657
• DOI: 10.1380/vss.65.53
• ISSN: 24335843
• ISSN: 24335835
• NDL BIB ID: 031996768
• Web Site: http://id.ndl.go.jp/bib/031996768
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I031996768
• Web Site: https://www.jstage.jst.go.jp/article/vss/65/2/65_20180832/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed