### Abstract

Frozen-phonon calculations based on the full-potential linearized augmented-plane-wave method are performed for the X-point phonon modes of the high-pressure FCC phase of solid iodine which becomes a superconductor at T ∼ 1 K. The longitudinal and the transverse phonon frequencies have been evaluated to be ω_{L}=231 cm^{-1} and ω_{T}=159 cm^{-1}, respectively, at 45 GPa. The phonon frequencies increase with increasing pressure. For example, we have obtained ω_{L}=260 cm^{-1} and ω_{T}=179 cm_{-1} at 64 GPa. The electron-phonon interaction is evaluated microscopically on the basis of the tight-binding scheme and then the phonon frequencies are calculated in the whole Brillouin zone by introducing appropriate short-range force constants. The results obtained are discussed in connection with pressure effects on superconductivity of FCC iodine.

Original language | English |
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Pages (from-to) | 454-456 |

Number of pages | 3 |

Journal | Physica B: Condensed Matter |

Volume | 219-220 |

Issue number | 1-4 |

DOIs | |

Publication status | Published - 1996 Apr 1 |

Externally published | Yes |

### ASJC Scopus subject areas

- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering

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## Cite this

*Physica B: Condensed Matter*,

*219-220*(1-4), 454-456. https://doi.org/10.1016/0921-4526(96)00776-4