Charge dynamics and electronic structures of monolayer graphene with molecular doping

C. C. Shen, C. T. Lin, L. J. Li, H. L. Liu

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

THz absorption and spectroscopic ellipsometry were used to investigate the charge dynamics and electronic structures of monolayer graphene with doping by triazine. The absorption spectrum of the triazine-doped film shows an optical excitation near 5.1 eV that is blue shifted compared with that of undoped analog. THz conductivity displays a coherent response of itinerant charge carriers at zero frequency and a disorder-induced finite frequency peak around 155 cm -1. Drude plasma frequency (∼4400 cm -1) decreases with decreasing temperature while carrier relaxation time (∼13 fs) is almost temperature independent, implying the semiconducting behavior with thermal activation energy of 3 meV.

Original languageEnglish
Article number111907
JournalApplied Physics Letters
Volume101
Issue number11
DOIs
Publication statusPublished - 2012 Sep 10

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Charge dynamics and electronic structures of monolayer graphene with molecular doping'. Together they form a unique fingerprint.

Cite this