AI Article Synopsis
- Inserting metal layers like Cr or Mn between transition-metal dichalcogenide (TMD) sheets creates new pseudo-2D nanomaterials by allowing metals to occupy energetically favorable spots.
- This bottom-up synthesis technique results in metals arranging in ordered phases as their concentration increases, leading to metastable configurations.
- The study also reveals that while dilute Cr atoms have high magnetic moments, increasing Cr concentrations lead to decreased moments, indicating antiferromagnetic ordering among Cr ions, highlighting potential for exploring quantum phenomena.
Article Abstract
Insertion of metal layers between layered transition-metal dichalcogenides (TMDs) enables the design of new pseudo-2D nanomaterials. The general premise is that various metal atoms may adopt energetically favorable intercalation sites between two TMD sheets. These covalently bound metals arrange in metastable configurations and thus enable the controlled synthesis of nanomaterials in a bottom-up approach. Here, this method is demonstrated by the insertion of Cr or Mn between VSe layers. Vacuum-deposited transition metals diffuse between VSe layers with increasing concentration, arranging in ordered phases. The Cr or Mn ions are in octahedral coordination and thus in a high-spin state. Measured and computed magnetic moments are high for dilute Cr atoms, but with increasing Cr concentration the average magnetic moment decreases, suggesting antiferromagnetic ordering between Cr ions. The many possible combinations of transition metals with TMDs form a library for exploring quantum phenomena in these nanomaterials.
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| http://dx.doi.org/10.1021/acs.nanolett.3c03169 | DOI Listing |
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