期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 9, 期 9, 页码 3058-3064出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0tc05121g
关键词
-
资金
- Slovenian Research Agency [P2-0412]
This study investigated the properties of the quasi-binary Bi2Se3-Bi2S3 system over a wide compositional range. It was found that S mainly incorporates into Bi2Se3 through the substitution of Se, leading to the formation of different types of crystals with varying S contents.
We explored the properties of the quasi-binary Bi2Se3-Bi2S3 system over a wide compositional range. X-ray diffraction analysis demonstrates that rhombohedral crystals can be synthesized within the solid solution interval 0-22 mol% Bi2S3, while at 33 mol% Bi2S3 only orthorhombic crystals are obtained. Core level photoemission spectroscopy reveals the presence of Bi3+, Se2- and S2- species and the absence of metallic species, thus indicating that S incorporation into Bi2Se3 proceeds prevalently through the substitution of Se with S. Spin- and angle-resolved photoemission spectroscopy shows that topological surface states develop on the surfaces of the Bi2Se3-ySy (y <= 0.66) rhombohedral crystals, in close analogy with the prototypical case of Bi2Se3, while the orthorhombic crystals with higher S content turn out to be trivial semiconductors. Our results connect unambiguously the phase diagram and electronic properties of the Bi2Se3-Bi2S3 system.
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