Magneto-optical fingerprints of distinct graphene multilayers using the giant infrared Kerr effect

Chase T. Ellis, Andreas V. Stier, Myoung Hwan Kim, Joseph G. Tischler, Evan R. Glaser, Rachael L. Myers-Ward, Joseph L. Tedesco, Charles R. Eddy, D. Kurt Gaskill, John Cerne

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

The remarkable electronic properties of graphene strongly depend on the thickness and geometry of graphene stacks. This wide range of electronic tunability is of fundamental interest and has many applications in newly proposed devices. Using the mid-infrared, magneto-optical Kerr effect, we detect and identify over 18 interband cyclotron resonances (CR) that are associated with ABA and ABC stacked multilayers as well as monolayers that coexist in graphene that is epitaxially grown on 4H-SiC. Moreover, the magnetic field and photon energy dependence of these features enable us to explore the band structure, electron-hole band asymmetries, and mechanisms that activate a CR response in the Kerr effect for various multilayers that coexist in a single sample. Surprisingly, we find that the magnitude of monolayer Kerr effect CRs is not temperature dependent. This unexpected result reveals new questions about the underlying physics that makes such an effect possible.

Original languageEnglish
Article number3143
JournalScientific reports
Volume3
DOIs
StatePublished - Nov 5 2013

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