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arXiv · 2104.05945

Peierls transition driven ferroelasticity in two-dimensional $d$-$f$ hybrid magnet

Haipeng You·Yang Zhang·Jun Chen·Ning Ding·Ming An·Lin Miao·Shuai Dong
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Abstract

For broad nanoscale applications, it is crucial to implement more functional properties, especially those ferroic orders, into two-dimensional materials. Here GdI$_3$ is theoretically identified as a honeycomb antiferromagnet with large $4f$ magnetic moment. The intercalation of metal atoms can dope electrons into Gd's $5d$-orbitals, which alters its magnetic state and lead to Peierls transition. Due to the strong electron-phonon coupling, the Peierls transition induces prominent ferroelasticity, making it a multiferroic system. The strain from undirectional stretching can be self-relaxed via resizing of triple ferroelastic domains, which can protect the magnet aganist mechnical breaking in flexible applications.

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Haipeng You, Yang Zhang, Jun Chen, Ning Ding, Ming An, Lin Miao, Shuai Dong. 2021-04-13. Peierls transition driven ferroelasticity in two-dimensional $d$-$f$ hybrid magnet. https://doi.org/10.1103/physrevb.103.l161408

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