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arXiv · 2601.05360

Layered CrGe1-xSe3+y with Cr Kagome Lattice and Antiferromagnetic Ordering

Jeremy G. Philbrick·Chaoguo Wang·Xin Gui·Tai Kong
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Abstract

We report the synthesis and properties of a new layered material, CrGe1-xSe3+y. The crystal structure was determined by using single crystal x-ray diffraction and transmission electron microscopy. CrGe1-xSe3+y crystallizes with a space group R-3m, featuring a double Kagome layer of chromium atoms, sandwiched between disordered Ge-Se layers. This compound displays antiferromagnetic order below 50 K, unlike the ferromagnetic behavior in CrGeTe3. Chromium displays an effective moment of ~3.9 {\mu}B/Cr, consistent with Cr3+ oxidation. The presence of this phase limits the possibility of a ferromagnetic CrGeSe3 analogous to CrGeTe3.

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Jeremy G. Philbrick, Chaoguo Wang, Xin Gui, Tai Kong. 2026-01-08. Layered CrGe1-xSe3+y with Cr Kagome Lattice and Antiferromagnetic Ordering. https://doi.org/10.1103/b9wl-lnvm

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