Anisotropic electron-phonon coupling in Rb-intercalated bilayer graphene

James Kleeman, Katsuaki Sugawara, Takafumi Sato, Takashi Takahashi

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

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 πbands 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.

Original languageEnglish
Article number124715
Journaljournal of the physical society of japan
Volume83
Issue number12
DOIs
Publication statusPublished - 2014 Dec 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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