Polarization and Strong Infra-Red Activity in Compressed Solid Hydrogen
凝聚态物理
2009-10-31 v1
摘要
Under a pressure of ~150 GPa solid molecular hydrogen undergoes a phase transition accompanied by a dramatic rise in infra-red absorption in the vibron frequency range. We use the Berry's phase approach to calculate the electric polarization in several candidate structures finding large, anisotropic dynamic charges and strongly IR-active vibron modes. The polarization is shown to be greatly affected by the overlap between the molecules in the crystal, so that the commonly used Clausius-Mossotti description in terms of polarizable, non-overlapping molecular charge densities is inadequate already at low pressures and even more so for the compressed solid.
引用
@article{arxiv.cond-mat/9809359,
title = {Polarization and Strong Infra-Red Activity in Compressed Solid Hydrogen},
author = {Ivo Souza and Richard M. Martin},
journal= {arXiv preprint arXiv:cond-mat/9809359},
year = {2009}
}
备注
To appear in Phys. Rev. Lett