期刊
RSC ADVANCES
卷 9, 期 10, 页码 5794-5803出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ra09441a
关键词
-
资金
- Strategic Priority Research Program (B) of the Chinese Academy of Sciences [XDB18010401]
- Key Research Program of Frontier Sciences of CAS [QYZDB-SSW-DQC009]
- 135 Program of the Institute of Geochemistry of CAS
- NSF of China [41474078, 41774099, 41772042]
- Supercomputer Center of Fujian Institute of Research on the Structure of Matter (FJIRSM)
- Hundred Talents Program of CAS
In this study, the vibrational and electrical transport properties of molybdenum diselenide were investigated under both non-hydrostatic and hydrostatic conditions up to similar to 40.2 GPa using the diamond anvil cell in conjunction with Raman spectroscopy, electrical conductivity, high-resolution transmission electron microscopy, atomic force microscopy, and first-principles theoretical calculations. The results obtained indicated that the semiconductor-to-metal electronic phase transition of MoSe2 can be extrapolated by some characteristic parameters including abrupt changes in the full width at half maximum of Raman modes, electrical conductivity and calculated bandgap. Under the non-hydrostatic condition, metallization occurred at similar to 26.1 GPa and it was irreversible. However, reversible metallization occurred at similar to 29.4 GPa under the hydrostatic condition. In addition, the pressure-induced metallization reversibility of MoSe2 can be revealed by high-resolution transmission electron and atomic force microscopy of the recovered samples under different hydrostatic conditions. This discrepancy in the metallization phenomenon of MoSe2 in different hydrostatic environments was attributed to the mitigated interlayer van der Waals coupling and shear stress caused by the insertion of pressure medium into the layers.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据