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

doi:10.1021/acs.nanolett.2c02510

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

Quantum Heterostructures

Research output: Contribution to journal › Article › peer-review

5 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 language	English
Pages (from-to)	7522-7526
Number of pages	5
Journal	Nano Letters
Volume	22
Issue number	18
DOIs	https://doi.org/10.1021/acs.nanolett.2c02510
State	Published - Sep 28 2022

Funding

The work at Rutgers is supported by the National Science Foundation’s DMR2004125, Army Research Office’s W911NF2010108, MURI W911NF2020166, and the center for Quantum Materials Synthesis (cQMS), funded by the Gordon and Betty Moore Foundation’s EPiQS initiative through Grant GBMF10104. The work at Oak Ridge National Laboratory is supported by the U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers and the Basic Energy Sciences, Materials Sciences and Engineering Division. The work at Brookhaven National Laboratory is supported by the Materials Science and Engineering Division, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DESC0012704. FIB use at the Center for Functional Nanomaterials, Brookhaven National Laboratory, is acknowledged.

Funders	Funder number
National Quantum Information Science Research Centers
National Science Foundation	DMR2004125
U.S. Department of Energy
Army Research Office	W911NF2010108
Gordon and Betty Moore Foundation	GBMF10104
Office of Science
Basic Energy Sciences	DESC0012704
Oak Ridge National Laboratory
Division of Materials Sciences and Engineering
Multidisciplinary University Research Initiative	W911NF2020166

Keywords

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

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10.1021/acs.nanolett.2c02510

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

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.",

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AU - Yao, Xiong

AU - Mazza, Alessandro R.

AU - Han, Myung Geun

AU - Yi, Hee Taek

AU - Jain, Deepti

AU - Brahlek, Matthew

AU - Oh, Seongshik

PY - 2022/9/28

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N2 - 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.

AB - 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.

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

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