Empty perovskites as Coulomb floppy networks: entropic elasticity and negative thermal expansion

30 Aug 2019 Alexei V. Tkachenko Igor A. Zaliznyak

Floppy Networks (FNs) provide valuable insight into the origin of anomalous mechanical and thermal properties in soft matter systems, from polymers, rubber, and biomolecules to glasses and granular materials. Here, we use the very same FN concept to construct a quantitative microscopic theory of empty perovskites, a family of crystals with ReO$_3$ structure, which exhibit a number of unusual properties... (read more)

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Categories


  • MATERIALS SCIENCE
  • SOFT CONDENSED MATTER
  • STATISTICAL MECHANICS