Density functional calculations of the reflectivity of shocked xenon with ionization based gap corrections.
Experimental results [1] for the reflection coefficient of shock compressed xenon are compared with results from quantum molecular dynamics calculations with density functional theory (DFT). The real part of the optical conductivity is calculated within the Kubo-Greenwood formalism and the Kramers-Kroenig relations are used to generate the reflectivity and other optical properties. Improved agreement over non-ideal plasma theory [2] is found with the DFT calculations, but significant differences with the data remain. Since DFT in the various local density approximations tends to underestimate the band gap and overestimate the free electron population, we have used the ionizations from [2] to correct the DFT band gaps. This results in much improved agreement with the xenon reflectivity data and demonstrates a new approach to correcting DFT band gaps.
- Research Organization:
- Sandia National Laboratories
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 950664
- Report Number(s):
- SAND2005-2063J
- Journal Information:
- Proposed for publication in Contributions to Plasma Physics., Journal Name: Proposed for publication in Contributions to Plasma Physics. Journal Issue: 3-4 Vol. 45; ISSN PLPHBZ; ISSN 0032-1028
- Country of Publication:
- United States
- Language:
- English
Similar Records
Free-free opacity in dense plasmas with an average atom model
Optical properties of water at high temperature