title: Polycrystalline graphene with single crystalline electronic structure.
abstract: We report the scalable growth of aligned graphene and hexagonal boron nitride on commercial copper foils, where each film originates from multiple nucleations yet exhibits a single orientation. Thorough characterization of our graphene reveals uniform crystallographic and electronic structures on length scales ranging from nanometers to tens of centimeters. As we demonstrate with artificial twisted graphene bilayers, these inexpensive and versatile films are ideal building blocks for large-scale layered heterostructures with angle-tunable optoelectronic properties.
authors.affiliation: Department of Chemistry and Chemical Biology, ‡Department of Physics, Laboratory of Atomic and Solid State Physics, ⊥School of Applied and Engineering Physics, and #Kavli Institute at Cornell for Nanoscale Science, Cornell University , Ithaca, New York 14853, United States.
authors.forename: Lola
authors.initials: L
authors.lastname: Brown
authors.forename: Edward B
authors.initials: EB
authors.lastname: Lochocki
authors.forename: José
authors.initials: J
authors.lastname: Avila
authors.forename: Cheol-Joo
authors.initials: CJ
authors.lastname: Kim
authors.forename: Yui
authors.initials: Y
authors.lastname: Ogawa
authors.forename: Robin W
authors.initials: RW
authors.lastname: Havener
authors.forename: Dong-Ki
authors.initials: DK
authors.lastname: Kim
authors.forename: Eric J
authors.initials: EJ
authors.lastname: Monkman
authors.forename: Daniel E
authors.initials: DE
authors.lastname: Shai
authors.forename: Haofei I
authors.initials: HI
authors.lastname: Wei
authors.forename: Mark P
authors.initials: MP
authors.lastname: Levendorf
authors.forename: María
authors.initials: M
authors.lastname: Asensio
authors.forename: Kyle M
authors.initials: KM
authors.lastname: Shen
authors.forename: Jiwoong
authors.initials: J
authors.lastname: Park
keywords: Graphene; angle-resolved photoemission spectroscopy; artificial twisted bilayer; dark-field transmission electron microscopy; hexagonal boron nitride