期刊
ACS NANO
卷 15, 期 9, 页码 14786-14793出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.1c04766
关键词
topological metals; surface states; STM/STS; spintronics; ARPES
类别
资金
- National Natural Science Foundation of China [21775078]
- DFG [SFB 1083]
- Ministry of Science and Higher Education of the Russian Federation [FEUZ-2020-0060]
- Jiangsu Innovative and Entrepreneurial Talents Project
- Science and Engineering Research Board (SERB)
- Department of Science and Technology (DST), government of India
- Ministry of Science and Technology of Taiwan [MOST-110-2124-M-006-010]
This study reveals surface-termination-dependent topological electronic states in mitrofanovite Pt3Te4, demonstrating its topological metal properties and the possibility of realizing two distinct electronic configurations with topological features on the surface of the same material.
Due to their peculiar quasiparticle excitations, topological metals have high potential for applications in the fields of spintronics, catalysis, and superconductivity. Here, by combining spin- and angle-resolved photoemission spectroscopy, scanning tunneling microscopy/spectroscopy, and density functional theory, we discover surface-termination-dependent topological electronic states in the recently discovered mitrofanovite Pt3Te4. Mitrofanovite crystal is formed by alternating, van der Waals bound layers of Pt2Te2 and PtTe2. Our results demonstrate that mitrofanovite is a topological metal with terminationdependent (i) electronic band structure and (ii) spin texture. Despite their distinct electronic character, both surface terminations are characterized by electronic states exhibiting strong spin polarization with a node at the G point and sign reversal across the G point, indicating their topological nature and the possibility of realizing two distinct electronic configurations (both of them with topological features) on the surface of the same material.
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