Superconducting Fourfold Fe(Te,Se) Film on Sixfold Magnetic MnTe via Hybrid Symmetry Epitaxy

Xiong Yao, Alessandro R. Mazza, Myung Geun Han, Hee Taek Yi, Deepti Jain, Matthew Brahlek, Seongshik Oh

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Epitaxial Fe(Te,Se) thin films have been grown on various substrates but never been grown on magnetic layers. Here we report the epitaxial growth of fourfold Fe(Te,Se) film on a sixfold antiferromagnetic insulator, MnTe. The Fe(Te,Se)/MnTe heterostructure shows a clear superconducting transition at around 11 K, and the critical magnetic field measurement suggests the origin of the superconductivity to be bulk-like. Structural characterizations suggest that the uniaxial lattice match between Fe(Te,Se) and MnTe allows a hybrid symmetry epitaxy mode, which was recently discovered between Fe(Te,Se) and Bi2Te3. Furthermore, the Te/Fe flux ratio during deposition of the Fe(Te,Se) layer is found to be critical for its superconductivity. Now that superconducting Fe(Te,Se) can be grown on two related hexagonal platforms, Bi2Te3and MnTe, this result opens a new possibility of combining topological superconductivity of Fe(Te,Se) with the rich physics in the intrinsic magnetic topological materials (MnTe)n(Bi2Te3)mfamily.

Original languageEnglish (US)
Pages (from-to)7522-7526
Number of pages5
JournalNano Letters
Volume22
Issue number18
DOIs
StatePublished - Sep 28 2022

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering

Keywords

  • Fe(Te,Se)/MnTe
  • Hybrid symmetry epitaxy
  • Superconductivity
  • Superconductor/magnetic insulator heterostructure
  • Uniaxial lattice match

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