期刊
PHYSICAL REVIEW B
卷 105, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.105.035110
关键词
-
资金
- National Key Research and Development Program of China [2016YFA0300404, 2019YFA0308602]
- Key Research and Development Pro-gram of Zhejiang Province, China [2021C01002]
- Fundamental Research Funds for the Central Universities in China
- National Natural Science Foundation of China [NSFC-11674326, NSFC11874357, NSFC-11774196, U1832141, U1932217, U2032215]
- Tsinghua University Initiative Scientific Research Program
- Chinese Academy of Sciences' Large-Scale Scientific Facility [U1832141, U1932217, U2032215]
This study investigates the electronic state of 1T-TaSe2 using scanning tunneling microscopy. Insulating and metallic states are found in different areas of the same sample, and the insulating state is similar to that in 1T-TaS2. Further investigations reveal that the electronic state measured on the upper-layer surface is associated with different stacking orders and the lower layer's electronic state.
The origin of different electronic states of 1T-TaS2 and 1T-TaSe2 remains controversial due to the complicated correlated electronic properties. We apply scanning tunneling microscopy to study the electronic state of bulk 1T-TaSe2. Both insulating and metallic states are identified in different areas of the same sample. The insulating state is similar to that in 1T-TaS2, concerning both the dI/dV spectrum and the orbital texture. With detailed investigations in single-step areas, the electronic state measured on the upper-layer surface is found to be associated with different stacking orders and the lower layer's electronic state. The insulating state is most possibly a single-layer property, perturbed to a metallic state by particular stacking orders. Both the metallic and large-gap insulating spectra, together with their corresponding stacking orders, are stable states in 1T-TaSe2. The connected metallic areas lead to the metallic transport behavior. We then reconcile the bulk metallic and surface insulating state in 1T-TaSe2. The rich phenomena in 1T-TaSe2 deepen our understanding of the correlated electronic state in bulk 1T-TaSe2 and 1T-TaS2.
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