TY - JOUR
T1 - Anisotropic electron-phonon coupling in Rb-intercalated bilayer graphene
AU - Kleeman, James
AU - Sugawara, Katsuaki
AU - Sato, Takafumi
AU - Takahashi, Takashi
N1 - Publisher Copyright:
© 2014 The Physical Society of Japan.
PY - 2014/12/15
Y1 - 2014/12/15
N2 - We have performed high-resolution angle-resolved photoemission spectroscopy on Rb-intercalated bilayer graphene, which is regarded as the thinnest limit of Rb-intercalated graphite (Rb-GIC). We have clearly observed a velocity renormalization of the π∗bands near the Fermi level, and electron doping from Rb atoms to the graphene layers. We attribute the renormalization to strong coupling of electrons with graphene's in-plane optical phonon mode. The electron-phonon coupling constant has been measured, and found to exhibit a strong momentum anisotropy similar to that of bulk GIC superconductors. This result provides evidence for universal electron-phonon coupling in intercalated multi-layer graphene and bulk GICs.
AB - We have performed high-resolution angle-resolved photoemission spectroscopy on Rb-intercalated bilayer graphene, which is regarded as the thinnest limit of Rb-intercalated graphite (Rb-GIC). We have clearly observed a velocity renormalization of the π∗bands near the Fermi level, and electron doping from Rb atoms to the graphene layers. We attribute the renormalization to strong coupling of electrons with graphene's in-plane optical phonon mode. The electron-phonon coupling constant has been measured, and found to exhibit a strong momentum anisotropy similar to that of bulk GIC superconductors. This result provides evidence for universal electron-phonon coupling in intercalated multi-layer graphene and bulk GICs.
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U2 - 10.7566/JPSJ.83.124715
DO - 10.7566/JPSJ.83.124715
M3 - Article
AN - SCOPUS:84925013837
VL - 83
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 12
M1 - 124715
ER -