Effect of linear density of states on the quasi-particle dynamics and small electron-phonon coupling in graphite

Autor:	Leem, C. S., Kim, B. J., Kim, Chul, Park, S. R., Ohta, T., Bostwick, A., Rotenberg, E., Kim, H. -D., Kim, M. K., Choi, H. J., Kim, C.
Rok vydání:	2007
Předmět:	Condensed Matter - Strongly Correlated Electrons
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.100.016802
Popis:	We obtained the spectral function of very high quality natural graphite single crystals using angle resolved photoelectron spectroscopy (ARPES). A clear separation of non-bonding and bonding bands and asymmetric lineshape are observed. The asymmetric lineshapes are well accounted for by the finite photoelectron escape depth and the band structure. The extracted width of the spectral function (inverse of the photohole life time) near the K point is, beyond the maximum phonon energy, approximately proportional to the energy as expected from the linear density of states near the Fermi energy. The upper bound for the electron-phonon coupling constant is about 0.2, a much smaller value than the previously reported one. Comment: 7 pages, 7 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0708.3420 Zobrazit plný text záznamu View this record from Arxiv