Orthorhombic carbon allotrope of compressed graphite: Ab initio calculations

Jian Tao Wang, Changfeng Chen, Yoshiyuki Kawazoe

Research output: Contribution to journalArticlepeer-review

87 Citations (Scopus)

Abstract

We identify by ab initio calculations an orthorhombic carbon (O-carbon) in Pbam (D2h9) symmetry for compressed graphite in AA stacking, which is formed via a distinct one-layer by one-layer slip and buckling mechanism along the [210] direction. It is dynamically stable and energetically more favorable than other known compressed graphite phases, albeit its slightly higher kinetic barrier. The O-carbon is comparable to diamond in ultralow compressibility, has a band gap wider than that of diamond, and is compatible with experimental x-ray diffraction data. The present results offer insights for understanding the complex structural landscape of compressed graphite and the versatile nature of carbon in forming a rich variety of structures under pressure.

Original languageEnglish
Article number033410
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number3
DOIs
Publication statusPublished - 2012 Jan 27

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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