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Construction of monolayer IrTe2 and the structural transition under low temperatures |
| Aiwei Wang(王爱伟)1,2, Ziyuan Liu(刘子媛)1,2, Jinbo Pan(潘金波)1,2, Qiaochu Li(李乔楚)1,2, Geng Li(李更)1,2,3, Qing Huan(郇庆)1, Shixuan Du(杜世萱)1,2,3,4, Hong-Jun Gao(高鸿钧)1,2,3,4 |
1 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
3 CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China;
4 Songshan Lake Materials Laboratory, Dongguan 523808, China |
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Abstract Bulk iridium ditelluride (IrTe2) is a layered material and is known for its interesting electronic and structural properties, such as large spin-orbit coupling, charge ordering, and superconductivity. However, so far there is no experimental study about the fabrication of monolayer IrTe2. Here we report the formation of IrTe2 monolayer on Ir(111) substrate by direct tellurization method. Scanning tunneling microscope (STM) images show the coexistence of 1/5 phase and 1/6 phase structures of IrTe2 at room temperature. We also obtained STM images showing distorted stripe feature under low temperatures. This stripe feature is possibly induced by the strain between the IrTe2 monolayer and the metal substrate. Density functional theory (DFT) calculations show that the IrTe2 monolayer has strong interaction with the underlying Ir(111) substrate.
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Received: 08 April 2020
Revised: 19 April 2020
Accepted manuscript online:
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PACS:
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81.05.Zx
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(New materials: theory, design, and fabrication)
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81.07.-b
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(Nanoscale materials and structures: fabrication and characterization)
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| Fund: Project supported by the National Key Research & Development Project of China (Grant Nos. 2019YFA0308500, 2018YFA0305800, and 2016YFA0202300), the National Natural Science Foundation of China (Grant Nos. 51991340, 61888102, and 11888101), and the Chinese Academy of Sciences (Grant Nos. XDB28000000 and XDB30000000). |
Corresponding Authors:
Geng Li
E-mail: gengli.iop@iphy.ac
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Cite this article:
Aiwei Wang(王爱伟), Ziyuan Liu(刘子媛), Jinbo Pan(潘金波), Qiaochu Li(李乔楚), Geng Li(李更), Qing Huan(郇庆), Shixuan Du(杜世萱), Hong-Jun Gao(高鸿钧) Construction of monolayer IrTe2 and the structural transition under low temperatures 2020 Chin. Phys. B 29 078102
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