2001/05/04 by Eugene Gregoryanz, Alexander F. Goncharov, Russell J. Hemley +2 · 3 citations
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Diamond and Carbon-based Materials Research #Force Microscopy Techniques and Applications #High-pressure geophysics and materials #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.64.052103
5 pages, 4 figures
arxiv created 2001/05/04 · openalex publication_date 2001/07/13 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The phase diagram and stability limits of diatomic solid nitrogen have been explored in a wide pressure-temperature range by several optical spectroscopic techniques. A narrow-gap semiconducting phase \ensuremathη has been found to exist in a range of 80--270 GPa and 10--510 K. The vibrational and optical properties of the \ensuremathη phase produced under these conditions indicate that it is largely amorphous and back transforms to a new molecular phase. The band gap of the \ensuremathη phase is found to decrease with pressure indicating possible metallization by band overlap above 280 GPa.