TY - JOUR
T1 - TaCo2Te2
T2 - An Air-Stable, High Mobility Van der Waals Material with Probable Magnetic Order
AU - Singha, Ratnadwip
AU - Yuan, Fang
AU - Cheng, Guangming
AU - Salters, Tyger H.
AU - Oey, Yuzki M.
AU - Villalpando, Graciela V.
AU - Jovanovic, Milena
AU - Yao, Nan
AU - Schoop, Leslie M.
N1 - Funding Information:
This work was supported by the Gordon and Betty Moore Foundation's EPIQS initiative through Grant GBMF9064, the David and Lucile Packard foundation, the Sloan foundation, and the Princeton Catalysis Initiative (PCI). The authors acknowledge the use of Princeton's Imaging and Analysis Center (IAC), which is partially supported by the Princeton Center for Complex Materials (PCCM), a National Science Foundation (NSF) Materials Research Science and Engineering Center (MRSEC; DMR‐2011750). The authors acknowledge the support from the University of California Santa Barbara Quantum Foundry, funded by the NSF (DMR‐1906325). The research reported here also made use of shared facilities of the UC Santa Barbara Materials Research Science and Engineering Center (NSF DMR‐1720256). Y.M.O is supported by the NSF Graduate Research Fellowship Program under Grant No. DGE‐1650114.
Funding Information:
This work was supported by the Gordon and Betty Moore Foundation's EPIQS initiative through Grant GBMF9064, the David and Lucile Packard foundation, the Sloan foundation, and the Princeton Catalysis Initiative (PCI). The authors acknowledge the use of Princeton's Imaging and Analysis Center (IAC), which is partially supported by the Princeton Center for Complex Materials (PCCM), a National Science Foundation (NSF) Materials Research Science and Engineering Center (MRSEC; DMR-2011750). The authors acknowledge the support from the University of California Santa Barbara Quantum Foundry, funded by the NSF (DMR-1906325). The research reported here also made use of shared facilities of the UC Santa Barbara Materials Research Science and Engineering Center (NSF DMR-1720256). Y.M.O is supported by the NSF Graduate Research Fellowship Program under Grant No. DGE-1650114.
Publisher Copyright:
© 2021 Wiley-VCH GmbH.
PY - 2022/2/16
Y1 - 2022/2/16
N2 - Van der Waals (vdW) materials are an indispensable part of functional device technology due to their versatile physical properties and ease of exfoliating to the low-dimensional limit. Among all the compounds investigated so far, the search for magnetic vdW materials has intensified in recent years, fueled by the realization of magnetism in 2D. However, metallic magnetic vdW systems are still uncommon. In addition, they rarely host high-mobility charge carriers, which is an essential requirement for high-speed electronic applications. Another shortcoming of 2D magnets is that they are highly air sensitive. Using chemical reasoning, TaCo2Te2 is introduced as an air-stable, high-mobility, magnetic vdW material. It has a layered structure, which consists of Peierls distorted Co chains and a large vdW gap between the layers. It is found that the bulk crystals can be easily exfoliated and the obtained thin flakes are robust to ambient conditions after 4 months of monitoring using an optical microscope. Signatures of canted antiferromagntic behavior are also observed at low-temperature. TaCo2Te2 shows a metallic character and a large, nonsaturating, anisotropic magnetoresistance. Furthermore, the Hall data and quantum oscillation measurements reveal the presence of both electron- and hole-type carriers and their high mobility.
AB - Van der Waals (vdW) materials are an indispensable part of functional device technology due to their versatile physical properties and ease of exfoliating to the low-dimensional limit. Among all the compounds investigated so far, the search for magnetic vdW materials has intensified in recent years, fueled by the realization of magnetism in 2D. However, metallic magnetic vdW systems are still uncommon. In addition, they rarely host high-mobility charge carriers, which is an essential requirement for high-speed electronic applications. Another shortcoming of 2D magnets is that they are highly air sensitive. Using chemical reasoning, TaCo2Te2 is introduced as an air-stable, high-mobility, magnetic vdW material. It has a layered structure, which consists of Peierls distorted Co chains and a large vdW gap between the layers. It is found that the bulk crystals can be easily exfoliated and the obtained thin flakes are robust to ambient conditions after 4 months of monitoring using an optical microscope. Signatures of canted antiferromagntic behavior are also observed at low-temperature. TaCo2Te2 shows a metallic character and a large, nonsaturating, anisotropic magnetoresistance. Furthermore, the Hall data and quantum oscillation measurements reveal the presence of both electron- and hole-type carriers and their high mobility.
KW - Peierls distortion
KW - antiferromagnetism
KW - high mobility
KW - van der Waals material
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U2 - 10.1002/adfm.202108920
DO - 10.1002/adfm.202108920
M3 - Article
AN - SCOPUS:85118874932
SN - 1616-301X
VL - 32
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 8
M1 - 2108920
ER -