Two-dimensional semiconducting gold

Ning Liu, Shifeng Jin, Liwei Guo, Gang Wang, Hezhu Shao, Liang Chen, and Xiaolong Chen
Phys. Rev. B 95, 155311 – Published 18 April 2017
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Abstract

We show that two-dimensional (2D) honeycomb gold (HG) could be thermodynamic and lattice dynamic stable owing in part to the relativistic effect and electronic configuration. HG exhibits a covalent characteristic in its bonding and is a semiconductor with an energy gap of 0.1 eV at the Brillouin zone K point caused by strong spin-orbit coupling. The gap can be further widened to about 0.3 eV if HG is tailored into nanoribbons with the armchair type of edges. In contrast, 2D close-packed gold (CPG) is metallic with a small effective mass. Both HG and CPG are more transparent to visible light than graphene. They are expected to outperform graphene as a semiconducting material in an electronic logic device and as a transparent conducting material in fabricating a display device, respectively.

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  • Received 20 September 2016
  • Revised 14 January 2017

DOI:https://doi.org/10.1103/PhysRevB.95.155311

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Ning Liu1,2, Shifeng Jin1,3, Liwei Guo1, Gang Wang1, Hezhu Shao4, Liang Chen4,*, and Xiaolong Chen1,3,5,*

  • 1Research and Development Center for Functional Crystals, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
  • 2University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
  • 3School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China
  • 4Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, People's Republic of China
  • 5Collaborative Innovation Center of Quantum Matter, Beijing 100084, People's Republic of China

  • *Corresponding authors: chenliang@nimte.ac.cn; chenx29@iphy.ac.cn

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Issue

Vol. 95, Iss. 15 — 15 April 2017

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