Structural metamaterials presenting negative values of one or more mechanical and
thermomechanical indices–namely the Poisson's ratio, the linear compressibility, and the …

Auxetics display the anomalous property of expanding laterally when uniaxially stretched,
that is, a negative Poisson's ratio, a property that arises from 1) the presence of specific …

A partially-auxetic metamaterial is introduced, inspired by the Maltese cross. Each unit of this
metamaterial consists of a pair of counter-rotating equal-armed crosses, which is …

A detailed study of the behavior under pressure of four important organic acids using the first-
principles solid-state methodology is presented. These organic acids are the L-(+)-lactic …

Rotating unit systems are one of the most important and well-known classes of auxetic
mechanical metamaterials. As their name implies, when loaded, these systems deform …

This paper proposes a truss microstructure that exhibits negative properties during increase
in temperature or moisture and decrease in pressure but reverses to conventional properties …

A type of mechanical metamaterial is proposed, whereby the effective coefficients of thermal
and moisture expansions (CTE and CME, respectively) can be tuned from positive to …

Graphyne is a planar network of connected carbon chains, each formed by n acetylene
linkages. Uncountable ways to make these connections lead to uncountable structural …

A class of 2D metamaterials with sign-switching coefficients of thermal, pressure and
moisture expansions is proposed herein—such materials not only change properties with …

Boron arsenate, BAsO4, is crystalline material (I 4¯ group) that was recently shown to be
auxetic in its (001) plane for loading in any direction in this plane, and, which exhibits …