Browsing by Author "Mishra, Rashmi Ranjan"

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    Carbon Nanotube Field Effect Transistor: Basic Characterization and Effect of High Dielectric Material
    (IJRTE, 2009-11) Mishra, Rashmi Ranjan
    As the scaling of Si MOSFET approaches towards its limiting value, new alternatives are coming up to overcome these limitations. Carbon nanotube field effect transistor (CNTFET) is found to be one of the most promising alternatives for bulk Si MOSFET. In this work we have simulated a cylindrical CNTFET. Based on the simulation results both output and transfer characteristic curves are plotted and analyzed. We have also studied the effect of different dielectric materials used as gate insulator.
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    Density functional calculation of Compton profiles of metals using phase-space approach
    (Elsevier, 1987-12) Mishra, Rashmi Ranjan
    Spherically averaged electron momentum densities (EMD) in Al, V and Cu metals have been calculated by using density functional theory in the phase-space approach. Compton profiles, J(q) and expectation values 〈pn〉 have been computed. These theoretical results show satisfactory agreement with the experimental data for Al, V and Cu.
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    Phonon dispersion of graphene revisited
    (Springer, 2012-06) Mishra, Rashmi Ranjan
    The phonon dispersion of graphene is derived by using a simple mass-spring model and considering up to the first, second, third, and fourth nearest neighbor interactions. The results obtained from different nearest neighbor interactions are compared and it is shown that the k2 dependence for the out of plane transverse acoustic mode obtained in other sophisticated methods as well as experiment occurs only after including the fourth nearest neighbor interaction.
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    Transformation from metallic electron charge density to electron momentum
    (Elsevier, 1986-12) Mishra, Rashmi Ranjan
    Electron momentum densities (EMD) in Al, V, Cr and Cu metals have been estimated from the metallic electron charge densities by applying the procedure of Burkhardt, Konya and Coulson and March. The procedure has provided spherically averaged EMD from which corresponding Compton profiles, J(q) and 〈pn〉 expectation values have been computed. These theoretical results show satisfactory agreement with the experimental data for Al, V, Cr and Cu.