Multiple topological states in iron-based superconductors

DOI DOI PDF Web Site 研究データあり 被引用文献26件 参考文献56件

書誌事項

公開日
2018-09-24
資源種別
journal article
権利情報
  • http://www.springer.com/tdm
DOI
  • 10.1038/s41567-018-0280-z
  • 10.48550/arxiv.1809.09977
公開者
Springer Science and Business Media LLC

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説明

Topological insulators and semimetals as well as unconventional iron-based superconductors have attracted major recent attention in condensed matter physics. Previously, however, little overlap has been identified between these two vibrant fields, even though the principal combination of topological bands and superconductivity promises exotic unprecedented avenues of superconducting states and Majorana bound states (MBSs), the central building block for topological quantum computation. Along with progressing laser-based spin-resolved and angle-resolved photoemission spectroscopy (ARPES) towards high energy and momentum resolution, we have resolved topological insulator (TI) and topological Dirac semimetal (TDS) bands near the Fermi level ($E_{\text{F}}$) in the iron-based superconductors Li(Fe,Co)As and Fe(Te,Se), respectively. The TI and TDS bands can be individually tuned to locate close to $E_{\text{F}}$ by carrier doping, allowing to potentially access a plethora of different superconducting topological states in the same material. Our results reveal the generic coexistence of superconductivity and multiple topological states in iron-based superconductors, rendering these materials a promising platform for high-$T_{\text{c}}$ topological superconductivity.

9 pages, 6 figures. arXiv admin note: substantial text overlap with arXiv:1803.00846, arXiv:1803.00845

収録刊行物

  • Nature Physics

    Nature Physics 15 (1), 41-47, 2018-09-24

    Springer Science and Business Media LLC

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