Disordered hyperuniformity in two-dimensional amorphous silica

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Science Advances  17 Apr 2020:
Vol. 6, no. 16, eaba0826
DOI: 10.1126/sciadv.aba0826
  • Fig. 1 Hyperuniformity in 2D amorphous silica.

    (A) TEM image of 2D amorphous silica. From (25). Reprinted with permission from the American Association for the Advancement of Science. (B) Disordered hyperuniform silica network generated via computer simulations as described in the main text. Blue and red spheres denote Si and O atoms, respectively. (C) and (D) respectively show the angularly averaged spectral density ψ(k) associated with the TEM micrograph and the simulated amorphous silica network. Insets show the full spectral density. (E) and (F) respectively show the local “ring” statistics of the experimentally obtained and simulated 2D amorphous silica network.

  • Fig. 2 Electronic structure of 2D amorphous silica.

    DOS of the supercells of 2D (A) crystalline and (B) hyperuniform SiO2 calculated using DFT. The inset shows a zoomed-in view of the DOS near the Fermi level.

  • Fig. 3 Electron densities and potential energies of 2D amorphous silica.

    Electron densities at the HOMO level of (A) the crystalline structure and (B) at the Fermi level of the DHU structure. The isosurface value is 0.0023 e/Bohr3. The corresponding distributions of potential energies are shown in (C) and (D), respectively. The color bar shows a range of the distributions.

Supplementary Materials

  • Supplementary Materials

    Disordered hyperuniformity in two-dimensional amorphous silica

    Yu Zheng, Lei Liu, Hanqing Nan, Zhen-Xiong Shen, Ge Zhang, Duyu Chen, Lixin He, Wenxiang Xu, Mohan Chen, Yang Jiao, Houlong Zhuang

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