@article{kim_bernholc_kwon_2010, title={Band gap control of small bundles of carbon nanotubes using applied electric fields: A density functional theory study}, volume={97}, ISSN={["0003-6951"]}, DOI={10.1063/1.3478237}, abstractNote={Electrostatic screening between carbon nanotubes (CNTs) in a small CNT bundle leads to a switching behavior induced by electric field perpendicular to the bundle axis. Using a first-principles method, we investigate the electronic structures of bundles consisting of two or three CNTs and the effects of the electric field applied perpendicular to the bundle axis. The applied field causes band gap closure in semiconducting bundles, while a gap opening occurs in metallic ones, which enables considerable modulation of bundle conductivity. The modulation effect originates from symmetry breaking due to electrostatic screening between the adjacent tube walls.}, number={6}, journal={APPLIED PHYSICS LETTERS}, author={Kim, Gunn and Bernholc, J. and Kwon, Young-Kyun}, year={2010}, month={Aug} } @article{kim_wang_lu_nardelli_bernholc_2008, title={Effects of end group functionalization and level alignment on electron transport in molecular devices}, volume={128}, number={2}, journal={Journal of Chemical Physics}, author={Kim, G. and Wang, S. C. and Lu, W. C. and Nardelli, M. B. and Bernholc, J.}, year={2008} } @article{kim_lee_lee_ihm_2007, title={Electron orbital valves made of multiply connected armchair carbon nanotubes with mirror-reflection symmetry: tight-binding study}, volume={19}, number={2}, journal={Journal of Physics. Condensed Matter}, author={Kim, G. and Lee, S. B. and Lee, H. and Ihm, J.}, year={2007} } @article{kim_jeong_ihm_2006, title={Deep levels in the band gap of the carbon nanotube with vacancy-related defects}, volume={88}, number={19}, journal={Applied Physics Letters}, author={Kim, G. and Jeong, B. W. and Ihm, J.}, year={2006} } @article{choi_kim_han_ihm_2006, title={Reduction of activation energy barrier of Stone-Wales transformation in endohedral metallofullerenes}, volume={73}, number={11}, journal={Physical Review. B, Condensed Matter and Materials Physics}, author={Choi, W. I. and Kim, G. and Han, S. and Ihm, J.}, year={2006} }