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|Abstract:||We introduce the concept of nearly hyperuniform network (NHN) structures as alternatives to the conventional continuous random network (CRN) models for amorphous tetrahedrally coordinated solids, such as amorphous silicon (a-Si). A hyperuniform solid has a structure factor S(k) that approaches zero as the wavenumber k -> 0. We define a NHN as an amorphous network whose structure factor S(k -> 0) is smaller than the liquid value at the melting temperature. Using a novel implementation of the Stillinger-Weber potential for the interatomic interactions, we show that the energy landscape for a spectrum of NHNs includes a sequence of local minima with an increasing degree of hyperuniformity [smaller S(k -> 0)] that is significantly below the frozen-liquid value and that correlates with other measurable features in S(k) at intermediate and large k and with the width of the electronic band gap.|
|Electronic Publication Date:||17-Jun-2013|
|Citation:||Hejna, Miroslav, Steinhardt, Paul J, Torquato, Salvatore. (2013). Nearly hyperuniform network models of amorphous silicon. PHYSICAL REVIEW B, 87, doi:10.1103/PhysRevB.87.245204|
|Type of Material:||Journal Article|
|Journal/Proceeding Title:||PHYSICAL REVIEW B|
|Version:||Final published version. Article is made available in OAR by the publisher's permission or policy.|
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