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

Research output: Contribution to journalArticle

Abstract

Disordered hyperuniformity (DHU) is a recently proposed new state of matter, which has been observed in a variety of classical and quantum many-body systems. DHU systems are characterized by vanishing infinite-wavelength normalized density fluctuations and are endowed with unique novel physical properties. Here, we report the discovery of disordered hyperuniformity in atomic-scale two-dimensional materials, i.e., amorphous silica composed of a single layer of atoms, based on spectral-density analysis of high-resolution transmission electron microscopy images. Moreover, we show via large-scale density functional theory calculations that DHU leads to almost complete closure of the electronic bandgap compared to the crystalline counterpart, making the material effectively a metal. This is in contrast to the conventional wisdom that disorder generally diminishes electronic transport and is due to the unique electron wave localization induced by the topological defects in the DHU state.

Original languageEnglish (US)
Article numbereaba0826
JournalScience Advances
Volume6
Issue number16
DOIs
StatePublished - Apr 2020

ASJC Scopus subject areas

  • General

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    Zheng, Y., Liu, L., Nan, H., Shen, Z. X., Zhang, G., Chen, D., He, L., Xu, W., Chen, M., Jiao, Y., & Zhuang, H. (2020). Disordered hyperuniformity in two-dimensional amorphous silica. Science Advances, 6(16), [eaba0826]. https://doi.org/10.1126/sciadv.aba0826