Short-Range Crystalline Order-Tuned Conductivity in Cr<sub>2</sub>Si<sub>2</sub>Te<sub>6</sub> van der Waals Magnetic Crystals.
basic_science · Level V
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- Record sourced from PubMed, PMID 35960957.
- Also identified by DOI 10.1021/acsnano.2c06080.
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Abstract
Two-dimensional magnetic materials (2DMMs) are significant not only for studies on the nature of 2D long-range magnetic order but also for future spintronic devices. Of particular interest are 2DMMs where spins can be manipulated by electrical conduction. Whereas Cr<sub>2</sub>Si<sub>2</sub>Te<sub>6</sub> exhibits magnetic order in few-layer crystals, its large band gap inhibits electronic conduction. Here we show that the defect-induced short-range crystal order in Cr<sub>2</sub>Si<sub>2</sub>Te<sub>6</sub>, on the length scale below 0.6 nm, induces a substantially reduced band gap and robust semiconducting behavior down to 2 K that turns to metallic above 10 GPa. Our results will be helpful in designing conducting states in 2DMMs and call for spin-resolved measurement of the electronic structure in exfoliated ultrathin crystals.