A novel mechanism is identified by James N. Grima‐Cornish, Liana Vella‐Żarb, and Joseph N. Grima in article number 1900550. It is found to lead to negative linear compressibility (NLC) in boron arsenate, which arises from deformations in the framework tetrahedra rather than tetrahedral rotations. It is hypothesized that the generic mechanisms identified will also apppear in materials and metamaterials with similar characteristics.

中文翻译：

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机械超材料：砷酸硼的负线性可压缩性和膨胀性（物理5/2020号）

James N. Grima-Cornish，LianaVella-Żarb和Joseph N. Grima在文章编号1900550中发现了一种新的机理。发现该机理导致砷酸硼中的负线性可压缩性（NLC），这是由于砷的变形引起的。框架是四面体而不是四面体旋转。假设确定的通用机制也将出现在具有相似特征的材料和超材料中。