Search results for "Quantum capacitance"

showing 2 items of 2 documents

Quantum Transport and Current Distribution at Radio Frequency in Multiwall Carbon Nanotubes

2012

Multiwall carbon nanotubes represent a low-dimensional material that could serve as building blocks for future carbon-based nanoelectronics. The understanding of the electromagnetic performances at radio frequency of these materials for use in nanointerconnects is strictly related to the analysis of their transport properties as function of the working conditions. In this paper, we present an explicit expression of the conducting channels as function of diameter, temperature, doping, and supply voltage for both metallic and semiconducting carbon nanotubes. The proposed formula is based on the Dirac cone approximation of the conducting band energy of graphene nearby the Fermi points, combine…

NanotubeMaterials scienceradio frequency (rf)Condensed matter physicscarbon nanotubesnanotechnologyGrapheneCarbon nanotube actuatorsconducting channelNanotechnologyCarbon nanotubeCondensed Matter::Mesoscopic Systems and Quantum Hall EffectComputer Science Applicationslaw.inventionOptical properties of carbon nanotubesCondensed Matter::Materials ScienceQuantum capacitanceNanoelectronicscarbon nanotube (cnt); carbon nanotubes; conducting channel; current distribution; nanotechnology; quantum transport; radio frequency (rf)lawcarbon nanotube (cnt)Ballistic conduction in single-walled carbon nanotubesElectrical and Electronic Engineeringcurrent distributionquantum transport
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Quantum capacitance: a microscopic derivation

2010

We start from microscopic approach to many body physics and show the analytical steps and approximations required to arrive at the concept of quantum capacitance. These approximations are valid only in the semi-classical limit and the quantum capacitance in that case is determined by Lindhard function. The effective capacitance is the geometrical capacitance and the quantum capacitance in series, and this too is established starting from a microscopic theory.

PhysicsSeries (mathematics)ta114Condensed Matter - Mesoscale and Nanoscale PhysicsFOS: Physical sciencesFunction (mathematics)Condensed Matter PhysicsCondensed Matter::Mesoscopic Systems and Quantum Hall EffectCapacitanceAtomic and Molecular Physics and OpticsMany bodyElectronic Optical and Magnetic MaterialsQuantum capacitanceClassical mechanicsQuantum mechanicsMesoscale and Nanoscale Physics (cond-mat.mes-hall)Limit (mathematics)Microscopic theoryQuantum dissipation
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