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arXiv · 2006.01094

Interlayer magnetism in Fe3-xGeTe2

Xiangru Kong·Giang D. Nguyen·Jinhwan Lee·Changgu Lee·Stuart Calder·Andrew F. May·Zheng Gai·An-Ping Li·Liangbo Liang·Tom Berlijn
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Abstract

Fe$_{3-x}$GeTe$_2$ is a layered van der Waals magnetic material with a relatively high ordering temperature and large anisotropy. While most studies have concluded the interlayer ordering to be ferromagnetic, there have also been reports of interlayer antiferromagnetism in Fe$_{3-x}$GeTe$_2$. Here, we investigate the interlayer magnetic ordering by neutron diffraction experiments, scanning tunneling microscopy (STM) and spin-polarized STM measurements, density functional theory plus U calculations and STM simulations. We conclude that the layers of Fe$_{3-x}$GeTe$_2$ are coupled ferromagnetically and that in order to capture the magnetic and electronic properties of Fe$_{3-x}$GeTe$_2$ within density functional theory, Hubbard U corrections need to be taken into account.

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Xiangru Kong, Giang D. Nguyen, Jinhwan Lee, Changgu Lee, Stuart Calder, Andrew F. May, Zheng Gai, An-Ping Li, Liangbo Liang, Tom Berlijn. 2020-06-01. Interlayer magnetism in Fe3-xGeTe2. https://doi.org/10.1103/physrevmaterials.4.094403

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