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14 papers · 1 filter
Hydrogen-induced disintegration of fullerenes and nanotubes: An ab initio study
Savas Berber, David Tomanek
We use ab initio density functional calculations to study hydrogen-induced disintegration of single- and multi-wall carbon fullerenes and nanotubes. Our results indicate that hydro…
Revealing Sub-Surface Vibrational Modes by Atom-Resolved Damping Force Spectroscopy
Makoto Ashino, Roland Wiesendanger, Andrei N. Khlobystov +2
We propose to use the damping signal of an oscillating cantilever in dynamic atomic force microscopy as a noninvasive tool to study the vibrational structure of the substrate. We p…
Voltage-driven quantum oscillations of conductance in graphene
V. A. Yampol'skii, S. S. Apostolov, Z. A. Maizelis +2
Locally-gated single-layer graphene sheets have unusual discrete energy states inside the potential barrier induced by a finite-width gate. These states are localized outside the D…
Modeling extended contacts to nanotube and graphene devices
Norbert Nemec, David Tomanek, Gianaurelio Cuniberti
Carrier injection into carbon nanotubes and graphene nanoribbons, contacted by a metal coating over an arbitrary length, is studied by various means: Minimal models allow for exact…
Spin currents in rough graphene nanoribbons: Universal fluctuations and spin injection
M. Wimmer, I. Adagideli, S. Berber +2
We investigate spin conductance in zigzag graphene nanoribbons and propose a spin injection mechanism based only on graphitic nanostructures. We find that nanoribbons with atomical…
Photovoltaic effect in bent quantum wires
Yu. V. Pershin, C. Piermarocchi
We propose a scheme for the generation of photocurrent in bent quantum wires. We calculate the current using a generalized Landauer-Buttiker approach that takes into account the el…