Mott phase in a van der Waals transition-metal halide at single layer limit
2020
The authors report the growth of a van der Waals crystal films CrI${}_{2}$ with film thickness down to the single layer limit, and identified its Mott insulator phase with scanning tunneling spectroscopy and density functional plus dynamic mean field theory calculations, which features a large band gap and characteristic spectral weight transfer at defects.
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