Pressure-induced depolarization and resonance in Raman scattering of single-crystalline boron carbide

Junjie Guo, Ling Zhang, Takeshi Fujita, Takashi Goto, Mingwei Chen

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

We report polarized and resonant Raman scattering of single-crystal boron carbide (B4 C) at high pressures. Significant intensity enhancements of 270 and 1086 cm-1 Raman bands of B4 C have been observed at quasihydrostatic pressures higher than ∼20GPa. The pressure-induced intensity change of the 1086 cm-1 band is mainly due to the resonance between excitation energy and electronic transition, whereas the intensity change of 270 cm -1 band is caused by the depolarization effect. Importantly, the first-order phase transition has not been found at high quasihydrostatic pressures and all the Raman intensity changes along with the corresponding high-pressure lattice distortion can be recovered during unloading.

Original languageEnglish
Article number060102
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume81
Issue number6
DOIs
Publication statusPublished - 2010 Feb 24

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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