Molecular beam epitaxy growth of iodide thin films

doi:10.1088/1674-1056/abcf93

Abstract Study of two-dimensional (2D) magnetic materials is important for both fundamental research and application. Here we report molecular beam epitaxy growth of iodides, candidates for exhibiting 2D magnetism. Decomposition of CrI₃ is utilized to produce stable gaseous I₂ flux. Growth of MnI₂, GdI₃, and CrI₂ down to monolayer is successful achieved by co-depositing I₂ and corresponding metal atoms. The thin films of the three materials are characterized by scanning tunneling microscope and found to be insulators with bandgaps of 4.4 eV, 0.6 eV, and 3.0 eV, respectively. The film growth paves the way for further study of magnetic properties at the 2D limit.

Keywords: two-dimensional magnetism iodide thin films molecular beam epitaxy scanning tunneling microscope

Received: 14 November 2020
Revised: 27 November 2020
Accepted manuscript online: 02 December 2020

PACS:	81.15.Hi	(Molecular, atomic, ion, and chemical beam epitaxy)
	75.50.Pp	(Magnetic semiconductors)
	07.79.Cz	(Scanning tunneling microscopes)
	73.22.-f	(Electronic structure of nanoscale materials and related systems)

Fund: Project supported by the Science Challenge Project (Grant No. TZ2016004).

Corresponding Authors: ^†Corresponding author. E-mail: na-li07@pku.edu.cn

Cite this article:

Xinqiang Cai(蔡新强), Zhilin Xu(徐智临), Shuai-Hua Ji(季帅华), Na Li(李娜), and Xi Chen(陈曦) Molecular beam epitaxy growth of iodide thin films 2021 Chin. Phys. B 30 028102

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