Anomalous vibrational properties of cubic boron arsenide

V. G. Hadjiev, M. N. Iliev, B. Lv, Z. F. Ren, C. W. Chu

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

We have studied cubic boron arsenide (BAs) by Raman spectroscopy and first-principles simulations. The Raman T2 phonon involving B vibrations in natBAs shows a complex isotope two-mode behavior, not seen before in isotopically disordered materials. The majority isotope 11B phonon at 704 cm-1 obeys average isotopic mass dependence and mass disorder renormalization, whereas a band at 723 cm-1 stems from predominately 10B vibrations in natBAs. The observed lack of T2 LO-TO splitting in both natBAs and 11BAs and third- and fourth-order anharmonicity contributions compensating each other in the temperature dependence of the T2 phonon are among the other curious vibrational properties of BAs.

Original languageEnglish
Article number024308
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume89
Issue number2
DOIs
Publication statusPublished - 2014 Jan 28

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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