University of Oulu

ACS Nano 2021, 15, 8, 13794–13802, Publication Date:July 27, 2021

Synthesis and properties of monolayer MnSe with unusual atomic structure and antiferromagnetic ordering

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Author: Aapro, Markus1; Huda, Nurul1; Karthikeyan, Jeyakumar2;
Organizations: 1Department of Applied Physics, Aalto University, 00076 Aalto, Finland
2Department of Applied Physics, Aalto University, 00076 Aalto, Finland; Rajiv Gandhi Institute of Petroleum Technology, Jais, Amethi 229304 Uttar Pradesh, India
3Microelectronics Research Unit, University of Oulu, 90014 Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 8.1 MB)
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Language: English
Published: American Chemical Society, 2021
Publish Date: 2021-10-04


Transition metal chalcogenides (TMCs) are a large family of 2D materials that are currently attracting intense interest. TMCs with 3d transition metals provide opportunities for introducing magnetism and strong correlations into the material with manganese standing out as a particularly attractive option due to its large magnetic moment. Here we report on the successful synthesis of monolayer manganese selenide on a NbSe2 substrate. Using scanning tunneling microscopy and spectroscopy experiments and global structure prediction calculations at the density functional theory level, we identify the atomic structure and magnetic and electronic properties of the layered Mn2Se2 phase. The structure is similar to the layered bulk phase of CuI or a buckled bilayer of h-BN. Interestingly, our results suggest that the monolayer is antiferromagnetic, but with an unusual out-of-plane ordering that results in two ferromagnetic planes.

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Series: ACS nano
ISSN: 1936-0851
ISSN-E: 1936-086X
ISSN-L: 1936-0851
Volume: 15
Issue: 8
Pages: 13794 - 13802
DOI: 10.1021/acsnano.1c05532
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
Funding: We thank J. Sainio for help and advice on the XPS data analysis. We acknowledge funding from the Academy of Finland (Academy Research Fellow Funding No. 311058, Academy Professor Funding Nos. 318995 and 320555, and Academy Postdoctoral Researcher Funding No. 309975) and the European Research Council (Grant ERC-2017-AdG No. 788185 “Artificial Designer Materials”). We gratefully acknowledge CSCIT Center for Science, Finland and the Aalto ScienceIT project for generous computational resources. This research made use of the Aalto Nanomicroscopy Center (Aalto NMC) facilities.
Academy of Finland Grant Number: 311058
Detailed Information: 311058 (Academy of Finland Funding decision)
318995 (Academy of Finland Funding decision)
320555 (Academy of Finland Funding decision)
309975 (Academy of Finland Funding decision)
Copyright information: © 2021 The Authors. Published by American Chemical Society. Published under the CC-BY 4.0 License.