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Papers by Rajeev Pandey
ACM Sigcse Bulletin, 1994
The 8-Queens problem [Wir7l] or the more general N-Queens problem is often used to explicate back... more The 8-Queens problem [Wir7l] or the more general N-Queens problem is often used to explicate backtrackin g in computing courses . A recent paper by Gray [Gra93] presents a detailed analysis of the N-Queens problem , and how fully analyzing the problem can lead to better ...
Physical Review B, 2009
Effect of localized oxygen functionalization on the conductance of metallic carbon nanotubes. MK ... more Effect of localized oxygen functionalization on the conductance of metallic carbon nanotubes. MK Ashraf 1 * , Nicolas A. Bruque 1 , Rajeev R. Pandey 2 , Philip G. Collins 3 , and Roger K. Lake 1 1 Department of Electrical Engineering ...
We perform of a comprehensive study of the effect of covalent oxygen attachment on the transmissi... more We perform of a comprehensive study of the effect of covalent oxygen attachment on the transmission of metallic carbon nanotubes (CNTs). Oxygen attachment on the CNT surface favors an ether type bond. Two oxygen atoms attached on the CNT surface within the same carbon ring on parallel bonds are energetically the most stable attachment configuration. In an armchair CNT, oxygen attachment favors the C-C bonds orthogonal to the CNT axis. Correlated addition propagates axially along parallel orthogonal bonds. In a zigzag CNT, oxygen attachment prefers the slanted bond, and correlated addition propagates spirally along parallel slanted bonds. Closely spaced oxygen attachment on the armchair and zigzag CNT surfaces causes a dip in transmission symmetrically away from the Fermi level. A clustered group of oxygen atoms covalently attached to a single-walled metallic zigzag CNT can result in a one order of magnitude drop in transmission that is asymmetric with respect to the Fermi energy resulting in a qualitative resemblance to conductance versus gate voltage curves observed experimentally [Science 315, 77 (2007)]. Calculations use density functional theory combined with non-equilibrium Green functions.
ACM Sigcse Bulletin, 1994
The 8-Queens problem [Wir7l] or the more general N-Queens problem is often used to explicate back... more The 8-Queens problem [Wir7l] or the more general N-Queens problem is often used to explicate backtrackin g in computing courses . A recent paper by Gray [Gra93] presents a detailed analysis of the N-Queens problem , and how fully analyzing the problem can lead to better ...
Physical Review B, 2009
Effect of localized oxygen functionalization on the conductance of metallic carbon nanotubes. MK ... more Effect of localized oxygen functionalization on the conductance of metallic carbon nanotubes. MK Ashraf 1 * , Nicolas A. Bruque 1 , Rajeev R. Pandey 2 , Philip G. Collins 3 , and Roger K. Lake 1 1 Department of Electrical Engineering ...
We perform of a comprehensive study of the effect of covalent oxygen attachment on the transmissi... more We perform of a comprehensive study of the effect of covalent oxygen attachment on the transmission of metallic carbon nanotubes (CNTs). Oxygen attachment on the CNT surface favors an ether type bond. Two oxygen atoms attached on the CNT surface within the same carbon ring on parallel bonds are energetically the most stable attachment configuration. In an armchair CNT, oxygen attachment favors the C-C bonds orthogonal to the CNT axis. Correlated addition propagates axially along parallel orthogonal bonds. In a zigzag CNT, oxygen attachment prefers the slanted bond, and correlated addition propagates spirally along parallel slanted bonds. Closely spaced oxygen attachment on the armchair and zigzag CNT surfaces causes a dip in transmission symmetrically away from the Fermi level. A clustered group of oxygen atoms covalently attached to a single-walled metallic zigzag CNT can result in a one order of magnitude drop in transmission that is asymmetric with respect to the Fermi energy resulting in a qualitative resemblance to conductance versus gate voltage curves observed experimentally [Science 315, 77 (2007)]. Calculations use density functional theory combined with non-equilibrium Green functions.