TY - JOUR
T1 - Mitrofanovite Pt3Te4
T2 - A Topological Metal with Termination-Dependent Surface Band Structure and Strong Spin Polarization
AU - Fujii, Jun
AU - Ghosh, Barun
AU - Vobornik, Ivana
AU - Bari Sarkar, Anan
AU - Mondal, Debashis
AU - Kuo, Chia Nung
AU - Bocquet, François C.
AU - Zhang, Lixue
AU - Boukhvalov, Danil W.
AU - Lue, Chin Shan
AU - Agarwal, Amit
AU - Politano, Antonio
N1 - Funding Information:
This work has been partly performed in the framework of the nanoscience foundry and fine analysis (NFFA-MUR Italy Progetti Internazionali) facility. L.Z. acknowledges funding by the National Natural Science Foundation of China (No. 21775078). F.C.B. acknowledges funding by the DFG through the SFB 1083 Structure and Dynamics of Internal Interfaces (Project A 12). D.W.B. acknowledges support by Ministry of Science and Higher Education of the Russian Federation (through the basic part of the government mandate, Project No. FEUZ-2020-0060) and Jiangsu Innovative and Entrepreneurial Talents Project. B.G. and A.A. acknowledge funding from Science and Engineering Research Board (SERB) and Department of Science and Technology (DST), government of India. A.A. thanks the HPC facility at IIT Kanpur for computational resources. C.S.L. and C.N.K. acknowledge funding by the Ministry of Science and Technology of Taiwan (MOST-110-2124-M-006-010).
Publisher Copyright:
© 2021 The Authors. Published by American Chemical Society.
PY - 2021
Y1 - 2021
N2 - 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 termination-dependent (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 Γ point and sign reversal across the Γ 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.
AB - 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 termination-dependent (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 Γ point and sign reversal across the Γ 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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U2 - 10.1021/acsnano.1c04766
DO - 10.1021/acsnano.1c04766
M3 - Article
C2 - 34472336
AN - SCOPUS:85115098045
SN - 1936-0851
JO - ACS Nano
JF - ACS Nano
ER -