Auxetics and Other Systems with Unusual Characteristics

This is the fifteenth volume of Physica Status Solidi B focussed on materials and models showing negative Poisson’s ratio (PR), which are often called auxetics, and other systems of unusual, e.g., “negative”, characteristics. This time it contains 19 papers which are grouped into three sections. The first two of them are devoted to macroscopic andmicroscopic auxetics, respectively. In the third section, other systems of unusual characteristics are presented.