CUED Publications database

Two-dimensional semiconducting gold

Liu, N and Jin, S and Guo, L and Wang, G and Shao, H and Chen, L and Chen, X (2017) Two-dimensional semiconducting gold. Physical Review B, 95. ISSN 2469-9950

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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.

Item Type: Article
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 12 May 2018 20:06
Last Modified: 10 Apr 2021 01:06
DOI: 10.1103/PhysRevB.95.155311