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Accessing new magnetic regimes by tuning the ligand spin-orbit coupling in van der Waals magnets | | Thomas A. Tartaglia
; Joseph N. Tang
; Jose L. Lado
; Faranak Bahrami
; Mykola Abramchuk
; Gregory T. McCandless
; Meaghan C. Doyle
; Kenneth S. Burch
; Ying Ran
; Julia Y. Chan
; Fazel Tafti
; | | Date: |
25 Jul 2020 | | Abstract: | Van der Waals (VdW) materials have opened new directions in the study of low
dimensional magnetism. A largely unexplored arena is the intrinsic tuning of
VdW magnets toward new ground-states. The chromium trihalides provided the
first such example with a change of inter-layer magnetic coupling emerging upon
exfoliation. Here, we take a different approach to engineer new ground-states,
not by exfoliation, but by tuning the spin-orbit coupling (SOC) of the
non-magnetic ligand atoms (Cl,Br,I). We synthesize a three-halide series,
CrCl$_{3-x-y}$Br$_{x}$I$_{y}$, and map their magnetic properties as a function
of Cl, Br, and I content. The resulting triangular phase diagrams unveil a
frustrated regime near CrCl$_{3}$. First-principles calculations confirm that
the frustration is driven by a competition between the chromium and halide
SOCs. Furthermore, we reveal a field-induced change of inter-layer coupling in
the bulk of CrCl$_{3-x-y}$Br$_{x}$I$_{y}$ crystals at the same field as in the
exfoliation experiments. | | Source: | arXiv, 2007.12818 | | Services: | Forum | Review | PDF | Favorites | |
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