Journal article
Pressure-induced symmetry-lowering transition in dense nitrogen to layered polymeric nitrogen (LP-N) with colossal Raman intensity
Physical review letters, Vol.113(20), pp.205502-205502
11/14/2014
Handle:
https://hdl.handle.net/2376/118367
PMID: 25432047
Abstract
We present the discovery of a novel nitrogen phase synthesized using laser-heated diamond anvil cells at pressures between 120-180 GPa well above the stability field of cubic gauche (cg)-N. This new phase is characterized by its singly bonded, layered polymeric (LP) structure similar to the predicted Pba2 and two colossal Raman bands (at ∼1000 and 1300 cm^{-1} at 150 GPa), arising from two groups of highly polarized nitrogen atoms in the bulk and surface of the layer, respectively. The present result also provides a new constraint for the nitrogen phase diagram, highlighting an unusual symmetry-lowering 3D cg-N to 2D LP-N transition and thereby the enhanced electrostatic contribution to the stabilization of this densely packed LP-N (ρ=4.85 g/cm^{3} at 120 GPa).
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Details
- Title
- Pressure-induced symmetry-lowering transition in dense nitrogen to layered polymeric nitrogen (LP-N) with colossal Raman intensity
- Creators
- Dane Tomasino - Department of Chemistry and Institute for Shock Physics, Washington State University, Pullman, Washington 99164, USAMinseob Kim - Department of Chemistry and Institute for Shock Physics, Washington State University, Pullman, Washington 99164, USAJesse Smith - High Pressure Collaborating Access Team at Advanced Photon Source, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, USAChoong-Shik Yoo - Department of Chemistry and Institute for Shock Physics, Washington State University, Pullman, Washington 99164, USA
- Publication Details
- Physical review letters, Vol.113(20), pp.205502-205502
- Academic Unit
- Institute for Shock Physics
- Publisher
- United States
- Identifiers
- 99900548080101842
- Language
- English
- Resource Type
- Journal article