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Interlayer Bond Formation in Black Phosphorus at High Pressure.

Demetrio Scelta1,2, Adhara Baldassarre2,3, Manuel Serrano-Ruiz1

  • 1ICCOM-CNR, Institute of Chemistry of OrganoMetallic Compounds, National Research Council of Italy, Via Madonna del Piano 10, I-50019 Sesto, Fiorentino, Firenze, Italy.

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|September 24, 2017
PubMed
Summary

Black phosphorus undergoes a two-step phase transition to a simple-cubic structure, revealing an intermediate phase. This finding offers insights into interlayer bonding and phosphorene-based systems.

Keywords:
X-ray diffractionblack phosphorusdiamond anvil cellphosphorenepseudo simple-cubic

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Solid State Chemistry

Background:

  • Black phosphorus exhibits unique layered structures with potential applications.
  • Understanding phase transitions is crucial for material property manipulation.
  • Previous studies on black phosphorus under pressure have shown complex structural changes.

Purpose of the Study:

  • To investigate the structural phase transitions of black phosphorus under high pressure.
  • To elucidate the mechanism of the A7 to simple-cubic phase transition.
  • To provide insights into interlayer bond formation and superconductivity.

Main Methods:

  • High-pressure experiments using a diamond anvil cell up to 30 GPa.
  • Synchrotron X-ray diffraction for structural analysis.
  • Rietveld refinement for detailed structural determination.

Main Results:

  • Observed persistence of A7-related peaks in the simple-cubic phase region.
  • Identified a two-step phase transition mechanism from A7 to simple-cubic.
  • Revealed an intermediate pseudo simple-cubic structure during the transition.
  • Provided new experimental evidence for anomalous pressure dependence of superconductivity.

Conclusions:

  • The A7 to simple-cubic transition in black phosphorus is a two-step process involving an intermediate phase.
  • This study deepens the understanding of interlayer bond formation in phosphorus allotropes.
  • Findings open avenues for designing and stabilizing phosphorene-based materials and understanding their superconducting properties.