| Autor: |
Xiaosong Wu, Jingjing Niu, Shulin Chen, Peng Gao, Dapeng Yu, Yanfeng Zhang, Dayu Yan, Zhilin Li, Sixian Yang, Youguo Shi, Wenjie Zhang, Xinguo Ren, Zhepeng Zhang |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Chinese Physics B. 29:097104 |
| ISSN: |
1674-1056 |
| DOI: |
10.1088/1674-1056/abab85 |
| Popis: |
Being parent materials of two-dimensional (2D) crystals, van der Waals layered materials have received revived interest. In most 2D materials, the interaction between electrons is negligible. Introducing the interaction can give rise to a variety of exotic properties. Here, via intercalating a van der Waals layered compound VS2, we find evidence for electron correlation by extensive magnetic, thermal, electrical, and thermoelectric characterizations. The low temperature Sommerfeld coefficient is 64 mJ⋅K−2⋅mol−1 and the Kadowaki–Woods ratio r KW ∼ 0.20a 0. Both supports an enhancement of the electron correlation. The temperature dependences of the resistivity and thermopower indicate an important role played by the Kondo effect. The Kondo temperature T K is estimated to be around 8 K. Our results suggest intercalation as a potential means to engineer the electron correlation in van der Waals materials, as well as 2D materials. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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