Construction of monolayer IrTe2 and the structural transition under low temperatures

doi:10.1088/1674-1056/ab90eb

中国物理B ›› 2020, Vol. 29 ›› Issue (7): 78102-078102.doi: 10.1088/1674-1056/ab90eb

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Construction of monolayer IrTe₂ and the structural transition under low temperatures

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)

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

收稿日期:2020-04-08 修回日期:2020-04-19 出版日期:2020-07-05 发布日期:2020-07-05
通讯作者: Geng Li E-mail:gengli.iop@iphy.ac
基金资助:
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).

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

Received:2020-04-08 Revised:2020-04-19 Online:2020-07-05 Published:2020-07-05
Contact: Geng Li E-mail:gengli.iop@iphy.ac
Supported by:
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).

摘要/Abstract

摘要： 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.

关键词: IrTe₂, monolayer, phase transition, density functional theory

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.

Key words: IrTe₂, monolayer, phase transition, density functional theory

中图分类号: (New materials: theory, design, and fabrication)

81.05.Zx

81.07.-b (Nanoscale materials and structures: fabrication and characterization)

王爱伟, 刘子媛, 潘金波, 李乔楚, 李更, 郇庆, 杜世萱, 高鸿钧. Construction of monolayer IrTe₂ and the structural transition under low temperatures[J]. 中国物理B, 2020, 29(7): 78102-078102.

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[J]. Chin. Phys. B, 2020, 29(7): 78102-078102.

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Construction of monolayer IrTe₂ and the structural transition under low temperatures

Construction of monolayer IrTe₂ and the structural transition under low temperatures

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