Plasmons and optical properties of semimetal graphite

Feng Lin Shyu, Ming Fa Lin

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

The weak interlayer bonding in Bernai graphite induces low-density free carriers and thus low-frequency plasmons (< 0.2 eV). Such plasmons reveal themselves as pronounced peaks in the loss spectra and abrupt edge structures in the reflectance spectra. The low-frequency plasmons are very sensitive to changes in temperature and momentum, mainly owing to the unique low-energy band structure. They can exist at larger momenta as temperature increases. The plasmon frequency clearly increases with temperature and momentum. The plasmon peak is broadened by temperature; furthermore, it decreases with momentum. The calculated results are consistent with the experimental measurements.

Original languageEnglish
Pages (from-to)3781-3784
Number of pages4
JournalJournal of the Physical Society of Japan
Volume69
Issue number12
DOIs
Publication statusPublished - 2000 Dec

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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