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William G. Cullen
Researcher at University of Maryland, College Park
Publications - 73
Citations - 5492
William G. Cullen is an academic researcher from University of Maryland, College Park. The author has contributed to research in topics: Graphene & Scanning tunneling microscope. The author has an hindex of 29, co-authored 73 publications receiving 5128 citations. Previous affiliations of William G. Cullen include Georgia Institute of Technology & National Institute of Standards and Technology.
Papers
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Atomic Structure of Graphene on SiO2
TL;DR: Atomic structures and nanoscale morphology of graphene-based electronic devices are revealed for the first time and a strong spatially dependent perturbation is revealed which breaks the hexagonal lattice symmetry of the graphitic lattice.
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Defect scattering in graphene.
TL;DR: Defected graphene shows a diverging resistivity at low temperature, indicating insulating behavior, and is best explained by ion-induced formation of lattice defects that result in midgap states.
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Isolation of Smaller Nanocrystal Au Molecules: Robust Quantum Effects in Optical Spectra
T. G. Schaaff,Marat N. Shafigullin,Joseph T. Khoury,Igor Vezmar,Robert L. Whetten,William G. Cullen,Phillip N. First,Gutierrez-Wing C,J. Ascensio,Miguel Jose-Yacaman +9 more
TL;DR: In this article, five massive gold-cluster molecules have been isolated in high yield and have undergone separate structural characterization, and their electronic structure has been deduced by optical absorption spectroscopy.
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Tunable Kondo effect in graphene with defects
TL;DR: In this article, the gate-tunable Kondo effect in ion-beam-damaged graphene suggests that defects induce magnetism in graphite, but it is unclear whether this extends to graphene.
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Spontaneous breaking of time-reversal symmetry in the pseudogap state of a high- T c superconductor
Adam Kaminski,Adam Kaminski,Stephan Rosenkranz,Stephan Rosenkranz,H. M. Fretwell,Juan Carlos Campuzano,Juan Carlos Campuzano,Zhao-Shen Li,Helene Raffy,William G. Cullen,H. You,C. G. Olson,Chandra Varma,Hartmut Höchst +13 more
TL;DR: It is reported that, for a material in the pseudogap state, left-circularly polarized photons give a different photocurrent from right- Circularly polarization photons, which shows that time-reversal symmetry is spontaneously broken below T*, which therefore corresponds to a phase transition.