Electronic and transport properties of carbon structures

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dc.contributor.advisor Cosby, Ronald M. en_US
dc.contributor.author Vasthari, Sudhendra en_US
dc.date.accessioned 2011-06-03T19:40:09Z
dc.date.available 2011-06-03T19:40:09Z
dc.date.created 2007 en_US
dc.date.issued 2007
dc.identifier LD2489.Z9 2007 .V37 en_US
dc.identifier.uri http://cardinalscholar.bsu.edu/handle/handle/187698
dc.description.abstract The electronic structure is determined for different carbon structures like carbon six chain, infinite graphene sheet, and different nanotubes. Electron transport properties of bare metallic carbon nanotubes (CNT) and a CNT with a single Barium atom are studied using the software Virtual NanoLab (VNL) and Atomistix ToolKit (ATK). The software combines advanced numerical methods, such as non-equilibrium Green's functions (NEGF) and density functional theory (DFT), to describe the detailed electronic structure of these carbon structures. Advanced numerical algorithms enable the application of a bias voltage across the structure, as well as the calculation and analysis of current-voltage characteristics of two-probe nanotubes.NanoLanguage scripts are written to generate and calculate the current for a two-probe bare CNT and a CNT with a single Barium atom. The currents thus obtained for different voltages are imported into Poly Software International (PSI) Plot spreadsheet and the current-voltage curves are plotted and compared for both the CNTs. The data is further analyzed and differential conductance is calculated and plotted for comparison. The current-voltage (IV) curves exhibit linearity for low voltages. Above a critical voltage, the IV curves flatten and exhibit features where sharp changes occur in the differential conductance. Adding a single Barium atom dramatically affects the conductance of the carbon nanotubes. en_US
dc.description.sponsorship Department of Physics and Astronomy
dc.format.extent vi, 76 leaves : ill. (chiefly col.) ; 28 cm. en_US
dc.source Virtual Press en_US
dc.subject.lcsh Carbon -- Electric properties -- Computer simulation. en_US
dc.subject.lcsh Carbon -- Transport properties -- Computer simulation. en_US
dc.subject.lcsh Nanotubes -- Computer simulation. en_US
dc.title Electronic and transport properties of carbon structures en_US
dc.type Research paper (M.A.), 3 hrs. en_US
dc.description.degree Thesis (M.A.) en_US
dc.identifier.cardcat-url http://liblink.bsu.edu/catkey/1380845 en_US

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  • Research Papers [5100]
    Research papers submitted to the Graduate School by Ball State University master's degree candidates in partial fulfillment of degree requirements.

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