title: Coulomb oscillations and Hall effect in quasi-2D graphite quantum dots.
abstract: We perform low-temperature electrical transport measurements on gated, quasi-2D graphite quantum dots. In devices with low contact resistances, we use longitudinal and Hall resistances to extract carrier densities of 9.2-13 x 10(12) cm(-2) and mobilities of 200-1900 cm(2)/V.s. In devices with high resistance contacts, we observe Coulomb blockade phenomena and infer the charging energies and capacitive couplings. These experiments demonstrate that electrons in mesoscopic graphite pieces are delocalized over nearly the whole graphite piece down to low temperatures.
authors.affiliation: Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, NY 14853, USA.
authors.forename: J Scott
authors.initials: JS
authors.lastname: Bunch
authors.forename: Yuval
authors.initials: Y
authors.lastname: Yaish
authors.forename: Markus
authors.initials: M
authors.lastname: Brink
authors.forename: Kirill
authors.initials: K
authors.lastname: Bolotin
authors.forename: Paul L
authors.initials: PL
authors.lastname: McEuen
mesh_terms: D004553:Electric Conductivity; D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D006108:Graphite / Q000032:analysis / Q000737:chemistry*; D008280:Magnetics; D008422:Materials Testing; D043942:Nanotubes / Q000032:analysis / Q000737:chemistry* / Q000648:ultrastructure; D045663:Quantum Dots; D055672:Static Electricity
chemical_list: D006108:Graphite