Solid-solid volume collapse transitions are zeroth order
强关联电子
2007-05-23 v1 材料科学
软凝聚态物质
统计力学
摘要
We present an exactly solvable non-linear elastic model of a volume collapse transition in an isotropic solid. Integrity of the lattice through the transition leads to an infinite-range density-density interaction, which drives classical critical behavior. Nucleation is forbidden within a pressure window leading to intrinsic hysteresis and an unavoidable discontinuity of the thermodynamic potential (zeroth order transition). The window shrinks with increasing temperature ending at a critical point at a temperature related to the shear modulus. Mixed phases behave non-extensively and show negative compressibility. We discuss the implications for Ce, SmS, and related systems.
引用
@article{arxiv.cond-mat/0307134,
title = {Solid-solid volume collapse transitions are zeroth order},
author = {S. Bustingorry and E. A. Jagla and J. Lorenzana},
journal= {arXiv preprint arXiv:cond-mat/0307134},
year = {2007}
}
备注
5 pages, 3 figures