TY - JOUR
T1 - Quasiparticle lifetime in graphite studied by ultrahigh-resolution ARPES
AU - Sugawara, K.
AU - Sato, T.
AU - Souma, S.
AU - Takahashi, T.
AU - Suematsu, H.
N1 - Funding Information:
This work was supported by grants from JSPS, JST-CREST, and MEXT of Japan. K.S. thanks JSPS for financial support.
PY - 2008/12
Y1 - 2008/12
N2 - We have performed ultrahigh-resolution angle-resolved photoemission spectroscopy (ARPES) to elucidate the nature of quasiparticle dynamics in graphite. We found fairly sharp quasiparticle peak of π band around K(H) point in the vicinity of the Fermi level, together with the strong mass renormalization of the band (kink). The imaginary part of electron self-energy (ImΣ) shows a sudden drop below 0.18 eV, indicative of a strong electron-phonon coupling. The linear energy dependence of ImΣ at higher binding energies provides an evidence for the deviation from the conventional Fermi liquid theory.
AB - We have performed ultrahigh-resolution angle-resolved photoemission spectroscopy (ARPES) to elucidate the nature of quasiparticle dynamics in graphite. We found fairly sharp quasiparticle peak of π band around K(H) point in the vicinity of the Fermi level, together with the strong mass renormalization of the band (kink). The imaginary part of electron self-energy (ImΣ) shows a sudden drop below 0.18 eV, indicative of a strong electron-phonon coupling. The linear energy dependence of ImΣ at higher binding energies provides an evidence for the deviation from the conventional Fermi liquid theory.
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U2 - 10.1016/j.jpcs.2008.06.008
DO - 10.1016/j.jpcs.2008.06.008
M3 - Article
AN - SCOPUS:57049133565
VL - 69
SP - 2996
EP - 2999
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
SN - 0022-3697
IS - 12
ER -