title: Magneto-optical fingerprints of distinct graphene multilayers using the giant infrared Kerr effect.
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.
authors.affiliation: Department of Physics, University at Buffalo, SUNY, Buffalo, New York, USA.
authors.forename: Chase T
authors.initials: CT
authors.lastname: Ellis
authors.forename: Andreas V
authors.initials: AV
authors.lastname: Stier
authors.forename: Myoung-Hwan
authors.initials: MH
authors.lastname: Kim
authors.forename: Joseph G
authors.initials: JG
authors.lastname: Tischler
authors.forename: Evan R
authors.initials: ER
authors.lastname: Glaser
authors.forename: Rachael L
authors.initials: RL
authors.lastname: Myers-Ward
authors.forename: Joseph L
authors.initials: JL
authors.lastname: Tedesco
authors.forename: Charles R
authors.initials: CR
authors.lastname: Eddy
authors.forename: D Kurt
authors.initials: DK
authors.lastname: Gaskill
authors.forename: John
authors.initials: J
authors.lastname: Cerne