Room-Temperature Ferromagnetism in Epitaxial Bilayer FeSb/SrTiO3(001) Terminated with a Kagome Lattice

Huimin Zhang; Qinxi Liu; Liangzi Deng; Yanjun Ma; Samira Daneshmandi; Cheng Cen; Chenyu Zhang; Paul M. Voyles; Xue Jiang; Jijun Zhao; Ching Wu Chu; Zheng Gai; Lian Li

doi:10.1021/acs.nanolett.3c03415

Room-Temperature Ferromagnetism in Epitaxial Bilayer FeSb/SrTiO₃(001) Terminated with a Kagome Lattice

Huimin Zhang, Qinxi Liu, Liangzi Deng, Yanjun Ma, Samira Daneshmandi, Cheng Cen, Chenyu Zhang, Paul M. Voyles, Xue Jiang, Jijun Zhao, Ching Wu Chu, Zheng Gai, Lian Li

Scanning Tunneling Microscopy Group

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

4 Scopus citations

Abstract

Two-dimensional (2D) magnets exhibit unique physical properties for potential applications in spintronics. To date, most 2D ferromagnets are obtained by mechanical exfoliation of bulk materials with van der Waals interlayer interactions, and the synthesis of single- or few-layer 2D ferromagnets with strong interlayer coupling remains experimentally challenging. Here, we report the epitaxial growth of 2D non-van der Waals ferromagnetic bilayer FeSb on SrTiO₃(001) substrates stabilized by strong coupling to the substrate, which exhibits in-plane magnetic anisotropy and a Curie temperature above 390 K. In situ low-temperature scanning tunneling microscopy/spectroscopy and density-functional theory calculations further reveal that an Fe Kagome layer terminates the bilayer FeSb. Our results open a new avenue for further exploring emergent quantum phenomena from the interplay of ferromagnetism and topology for application in spintronics.

Original language	English
Pages (from-to)	122-129
Number of pages	8
Journal	Nano Letters
Volume	24
Issue number	1
DOIs	https://doi.org/10.1021/acs.nanolett.3c03415
State	Published - Jan 10 2024

Funding

The MBE and STM work were supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award No. DE-SC0017632 and the National Science Foundation (Grant No. EFMA-1741673).Liangzi Deng, Samira Daneshmandi, and Ching-Wu Chu acknowledges support from US Air Force Office of Scientific Research Grants FA9550-15-1-0236 and FA9550-20-1-0068, the T.L.L. Temple Foundation, the John J. and Rebecca Moores Endowment, and the State of Texas through the Texas Center for Superconductivity at the University of Houston (TcSUH). Huimin Zhang, Xue Jiang and Jijun Zhao acknowledge support from the National Natural Science Foundation of China (Grant Nos. 12304210, 11874097, 12274050, 91961204) and the Fundamental Research Funds for the Central Universities (DUT22LAB104, DUT22ZD103). The TEM work was supported by the US Department of Energy, Basic Energy Sciences (DE-FG02-08ER46547) and user facilities supported by the Wisconsin MRSEC (DMR-1720415).

Funders	Funder number
State of Texas
National Science Foundation	EFMA-1741673
U.S. Department of Energy
Air Force Office of Scientific Research	FA9550-15-1-0236, FA9550-20-1-0068
Basic Energy Sciences	DE-FG02-08ER46547
University of Houston
Division of Materials Sciences and Engineering	DE-SC0017632
Materials Research Science and Engineering Center, Harvard University	DMR-1720415
T.L.L Temple Foundation
John J. and Rebecca Moores Endowment
National Natural Science Foundation of China	11874097, 91961204, 12304210, 12274050
Fundamental Research Funds for the Central Universities	DUT22LAB104, DUT22ZD103

Keywords

FeSb films
Kagome lattice
MBE
room-temperature ferromagnetism

Access to Document

10.1021/acs.nanolett.3c03415

Cite this

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title = "Room-Temperature Ferromagnetism in Epitaxial Bilayer FeSb/SrTiO3(001) Terminated with a Kagome Lattice",

abstract = "Two-dimensional (2D) magnets exhibit unique physical properties for potential applications in spintronics. To date, most 2D ferromagnets are obtained by mechanical exfoliation of bulk materials with van der Waals interlayer interactions, and the synthesis of single- or few-layer 2D ferromagnets with strong interlayer coupling remains experimentally challenging. Here, we report the epitaxial growth of 2D non-van der Waals ferromagnetic bilayer FeSb on SrTiO3(001) substrates stabilized by strong coupling to the substrate, which exhibits in-plane magnetic anisotropy and a Curie temperature above 390 K. In situ low-temperature scanning tunneling microscopy/spectroscopy and density-functional theory calculations further reveal that an Fe Kagome layer terminates the bilayer FeSb. Our results open a new avenue for further exploring emergent quantum phenomena from the interplay of ferromagnetism and topology for application in spintronics.",

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author = "Huimin Zhang and Qinxi Liu and Liangzi Deng and Yanjun Ma and Samira Daneshmandi and Cheng Cen and Chenyu Zhang and Voyles, {Paul M.} and Xue Jiang and Jijun Zhao and Chu, {Ching Wu} and Zheng Gai and Lian Li",

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AU - Zhang, Huimin

AU - Liu, Qinxi

AU - Deng, Liangzi

AU - Ma, Yanjun

AU - Daneshmandi, Samira

AU - Cen, Cheng

AU - Zhang, Chenyu

AU - Voyles, Paul M.

AU - Jiang, Xue

AU - Zhao, Jijun

AU - Chu, Ching Wu

AU - Gai, Zheng

AU - Li, Lian

PY - 2024/1/10

Y1 - 2024/1/10

N2 - Two-dimensional (2D) magnets exhibit unique physical properties for potential applications in spintronics. To date, most 2D ferromagnets are obtained by mechanical exfoliation of bulk materials with van der Waals interlayer interactions, and the synthesis of single- or few-layer 2D ferromagnets with strong interlayer coupling remains experimentally challenging. Here, we report the epitaxial growth of 2D non-van der Waals ferromagnetic bilayer FeSb on SrTiO3(001) substrates stabilized by strong coupling to the substrate, which exhibits in-plane magnetic anisotropy and a Curie temperature above 390 K. In situ low-temperature scanning tunneling microscopy/spectroscopy and density-functional theory calculations further reveal that an Fe Kagome layer terminates the bilayer FeSb. Our results open a new avenue for further exploring emergent quantum phenomena from the interplay of ferromagnetism and topology for application in spintronics.

AB - Two-dimensional (2D) magnets exhibit unique physical properties for potential applications in spintronics. To date, most 2D ferromagnets are obtained by mechanical exfoliation of bulk materials with van der Waals interlayer interactions, and the synthesis of single- or few-layer 2D ferromagnets with strong interlayer coupling remains experimentally challenging. Here, we report the epitaxial growth of 2D non-van der Waals ferromagnetic bilayer FeSb on SrTiO3(001) substrates stabilized by strong coupling to the substrate, which exhibits in-plane magnetic anisotropy and a Curie temperature above 390 K. In situ low-temperature scanning tunneling microscopy/spectroscopy and density-functional theory calculations further reveal that an Fe Kagome layer terminates the bilayer FeSb. Our results open a new avenue for further exploring emergent quantum phenomena from the interplay of ferromagnetism and topology for application in spintronics.

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