Short-Range Crystalline Order-Tuned Conductivity in Cr2Si2Te6 van der Waals Magnetic Crystals

Liu, Yu; Susilo, Resta A.; Lee, Yongbin; Abeykoon, A. M. Milinda; Tong, Xiao; Hu, Zhixiang; Stavitski, Eli; Attenkofer, Klaus; Ke, Liqin; Chen, Bin; Petrovic, Cedomir

doi:10.1021/acsnano.2c06080

Title: Short-Range Crystalline Order-Tuned Conductivity in Cr₂Si₂Te₆ van der Waals Magnetic Crystals

Journal Article · 11 August 2022 · ACS Nano

DOI: https://doi.org/10.1021/acsnano.2c06080 · OSTI ID:1902758

^[1];

^[2]; Lee, Yongbin ^[3]; Abeykoon, A. M. Milinda ^[4]; Tong, Xiao ^[5]; Hu, Zhixiang ^[6]; Stavitski, Eli ^[4]; Attenkofer, Klaus ^[4]; Ke, Liqin ^[3]; Chen, Bin ^[2];

^[6]

Brookhaven National Lab. (BNL), Upton, NY (United States)
Center for High Pressure Science and Technology Advanced Research, Shanghai (China)
Ames Lab., Ames, IA (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)

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 Cr₂Si₂Te₆ 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 Cr₂Si₂Te₆, 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 in this work will be helpful in designing conducting states in 2DMMs and call for spin-resolved measurement of the electronic structure in exfoliated ultrathin crystals.

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Research Organization:: Ames Laboratory (AMES), Ames, IA (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN); Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)

Sponsoring Organization:: National Natural Science Foundation of China (NSFC); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division

Grant/Contract Number:: AC02-07CH11358; SC0012704

OSTI ID:: 1902758

Report Number(s):: IS-J-10,872

Journal Information:: ACS Nano, Journal Name: ACS Nano Journal Issue: 8 Vol. 16; ISSN 1936-0851

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Cr2Si2Te6
electronic structure
insulator−metal transition
short-range crystalline order
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Title: Short-Range Crystalline Order-Tuned Conductivity in Cr2Si2Te6 van der Waals Magnetic Crystals

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Title: Short-Range Crystalline Order-Tuned Conductivity in Cr₂Si₂Te₆ van der Waals Magnetic Crystals