Scattering of phonons in hexagonal 2D crystals on their domain boundaries

M. Belhadi, A. Khater, O. Rafil, J. Hardy

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

The scattering of phonons in two-dimensional hexagonal crystals at their defect boundaries are investigated. These so-called Wigner crystals exist in different monolayer and bilayer forms and present a rich variety of defect boundaries. To fix the calculation we investigate phonon scattering for the physisorbed monolayers on solid surfaces, that exhibit two types of domain boundaries called heavy and superheavy solitons delimiting the crystalline ordered phase domains. A detailed study is presented for the reflection and transmission of the two-dimensional 2D crystal phonons at these domain boundaries, where the scattering spectra are related to the change of their elastic constants. Fano resonances may appear in the phonon transmission spectra due to the coherent coupling between the 2D crystal phonons and the localised vibration modes on the domain boundary. For a resonator cavity made up of two such domain boundaries, additional Fabry-Perot oscillations are found in the scattering spectra.

Original languageEnglish
Pages (from-to)685-693
Number of pages9
JournalPhysica Status Solidi (B) Basic Research
Volume228
Issue number3
DOIs
Publication statusPublished - Dec 2001
Externally publishedYes

Fingerprint

Phonons
phonons
Scattering
Crystals
scattering
crystals
Monolayers
Defects
Phonon scattering
Cavity resonators
Elastic constants
Solitons
defects
cavity resonators
Crystalline materials
solid surfaces
fixing
vibration mode
elastic properties
solitary waves

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Scattering of phonons in hexagonal 2D crystals on their domain boundaries. / Belhadi, M.; Khater, A.; Rafil, O.; Hardy, J.

In: Physica Status Solidi (B) Basic Research, Vol. 228, No. 3, 12.2001, p. 685-693.

Research output: Contribution to journalArticle

Belhadi, M. ; Khater, A. ; Rafil, O. ; Hardy, J. / Scattering of phonons in hexagonal 2D crystals on their domain boundaries. In: Physica Status Solidi (B) Basic Research. 2001 ; Vol. 228, No. 3. pp. 685-693.
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