Fabrication of honeycomb AuTe monolayer with Dirac nodal line fermions

doi:10.1088/1674-1056/aca14a

中国物理B ›› 2023, Vol. 32 ›› Issue (1): 16102-016102.doi: 10.1088/1674-1056/aca14a

Fabrication of honeycomb AuTe monolayer with Dirac nodal line fermions

Qin Wang(汪琴)^1,2,#, Jie Zhang(张杰)^1,2,#, Jierui Huang(黄杰瑞)^1,2,#, Jinan Shi(时金安)¹, Shuai Zhang(张帅)², Hui Guo(郭辉)², Li Huang(黄立)², Hong Ding(丁洪)^2,3,4, Wu Zhou(周武)^1,3, Yan-Fang Zhang(张艳芳)^1,†, Xiao Lin(林晓)^1,3,‡, Shixuan Du(杜世萱)^2,1,3,4,§, and Hong-Jun Gao(高鸿钧)^2,1,3,4,¶

1 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
2 Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
3 CAS Center for Excellent 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:2022-10-13 修回日期:2022-11-08 接受日期:2022-11-09 出版日期:2022-12-08 发布日期:2022-12-08
通讯作者: Yan-Fang Zhang, Xiao Lin, Shixuan Du, Hong-Jun Gao E-mail:zhangyanfang@ucas.ac.cn;xlin@ucas.ac.cn;sxdu@iphy.ac.cn;hjgao@iphy.ac.cn
基金资助:
Project supported by the National Key R&D Program of China (Grant No. 2018YFA0305800), the National Natural Science Foundation of China (Grant Nos. 61925111, 61888102, and 52102193), the Strategic Priority Research Program of Chinese Academy of Sciences (Grant Nos. XDB28000000 and XDB30000000), CAS Project for Young Scientists in Basic Research (Grant No. YSBR-003), and the Fundamental Research Funds for the Central Universities.

Fabrication of honeycomb AuTe monolayer with Dirac nodal line fermions

1 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
2 Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
3 CAS Center for Excellent in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China;
4 Songshan Lake Materials Laboratory, Dongguan 523808, China

Received:2022-10-13 Revised:2022-11-08 Accepted:2022-11-09 Online:2022-12-08 Published:2022-12-08
Contact: Yan-Fang Zhang, Xiao Lin, Shixuan Du, Hong-Jun Gao E-mail:zhangyanfang@ucas.ac.cn;xlin@ucas.ac.cn;sxdu@iphy.ac.cn;hjgao@iphy.ac.cn
Supported by:
Project supported by the National Key R&D Program of China (Grant No. 2018YFA0305800), the National Natural Science Foundation of China (Grant Nos. 61925111, 61888102, and 52102193), the Strategic Priority Research Program of Chinese Academy of Sciences (Grant Nos. XDB28000000 and XDB30000000), CAS Project for Young Scientists in Basic Research (Grant No. YSBR-003), and the Fundamental Research Funds for the Central Universities.

1. 附件.pdf(1838KB)

摘要/Abstract

摘要： Two-dimensional honeycomb lattices show great potential in the realization of Dirac nodal line fermions (DNLFs). Here, we successfully synthesized a gold telluride (AuTe) monolayer by direct tellurizing an Au(111) substrate. Low energy electron diffraction measurements reveal that it is (2×2) AuTe layer stacked onto (3×3) Au(111) substrate. Moreover, scanning tunneling microscopy images show that the AuTe layer has a honeycomb structure. Scanning transmission electron microscopy reveals that it is a single-atom layer. In addition, first-principles calculations demonstrate that the honeycomb AuTe monolayer exhibits Dirac nodal line features protected by mirror symmetry, which is validated by angle-resolved photoemission spectra. Our results establish that monolayer AuTe can be a good candidate to investigate 2D DNLFs and provides opportunities to realize high-speed low-dissipation devices.

关键词: honeycomb lattices, transition-metal monochalcogenides, AuTe monolayer, two-dimensional (2D) Dirac nodal line fermions

Abstract: Two-dimensional honeycomb lattices show great potential in the realization of Dirac nodal line fermions (DNLFs). Here, we successfully synthesized a gold telluride (AuTe) monolayer by direct tellurizing an Au(111) substrate. Low energy electron diffraction measurements reveal that it is (2×2) AuTe layer stacked onto (3×3) Au(111) substrate. Moreover, scanning tunneling microscopy images show that the AuTe layer has a honeycomb structure. Scanning transmission electron microscopy reveals that it is a single-atom layer. In addition, first-principles calculations demonstrate that the honeycomb AuTe monolayer exhibits Dirac nodal line features protected by mirror symmetry, which is validated by angle-resolved photoemission spectra. Our results establish that monolayer AuTe can be a good candidate to investigate 2D DNLFs and provides opportunities to realize high-speed low-dissipation devices.

Key words: honeycomb lattices, transition-metal monochalcogenides, AuTe monolayer, two-dimensional (2D) Dirac nodal line fermions

中图分类号:

61.46.+w

68.65.-k (Low-dimensional, mesoscopic, nanoscale and other related systems: structure and nonelectronic properties) 73.22.-f (Electronic structure of nanoscale materials and related systems) 81.10.-h (Methods of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)

Qin Wang(汪琴), Jie Zhang(张杰), Jierui Huang(黄杰瑞), Jinan Shi(时金安), Shuai Zhang(张帅), Hui Guo(郭辉), Li Huang(黄立), Hong Ding(丁洪), Wu Zhou(周武), Yan-Fang Zhang(张艳芳), Xiao Lin(林晓), Shixuan Du(杜世萱), and Hong-Jun Gao(高鸿钧). Fabrication of honeycomb AuTe monolayer with Dirac nodal line fermions[J]. 中国物理B, 2023, 32(1): 16102-016102.

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Fabrication of honeycomb AuTe monolayer with Dirac nodal line fermions

Fabrication of honeycomb AuTe monolayer with Dirac nodal line fermions

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