|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'585
Articles rated: 2609
25 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Phonon surface mapping of graphite: disentangling quasi--degenerate phonon dispersions | | A. Grüneis
; J. Serrano
; A. Bosak
; M. Lazzeri
; S.L. Molodtsov
; L. Wirtz
; C. Attaccalite
; M. Krisch
; A. Rubio
; F. Mauri
; T. Pichler
; | | Date: |
21 Apr 2009 | | Abstract: | The two-dimensional mapping of the phonon dispersions around the $K$ point of
graphite by inelastic x-ray scattering is provided. The present work resolves
the longstanding issue related to the correct assignment of transverse and
longitudinal phonon branches at $K$. We observe an almost degeneracy of the
three TO, LA and LO derived phonon branches and a strong phonon trigonal
warping. Correlation effects renormalize the Kohn anomaly of the TO mode, which
exhibits a trigonal warping effect opposite to that of the electronic band
structure. We determined the electron--phonon coupling constant to be
166$
m(eV/AA)^2$ in excellent agreement to $GW$ calculations. These results
are fundamental for understanding angle-resolved photoemission,
double--resonance Raman and transport measurements of graphene based systems. | | Source: | arXiv, 0904.3205 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER