Electromechanical responses of single-walled carbon nanotubes: Interplay between the strain-induced energy-gap opening and the pinning of the Fermi level

GUANG-YU GUO2018-09-102018-09-10200500218979http://www.scopus.com/inward/record.url?eid=2-s2.0-25144447612&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/315980A comprehensive picture of electromechanical responses of carbon single-walled nanotubes (SWNTs) is obtained using ab initio density-functional theory and self-consistent π -orbital Hamiltonian. We find a linear behavior of the energy gap of zigzag SWNTs as a function of the axial strain with different slopes for compression versus extension. Observed small changes in conductance even with a substantial energy gap due to the strain is attributed to the pinning of the Fermi level near the top of the valence band. © 2005 American Institute of Physics.[SDGs]SDG7Electromechanical responses; Energy gaps; Linear behavior; Single-walled nanotubes (SWNT); Fermi level; Hamiltonians; Linear systems; Probability density function; Carbon nanotubesElectromechanical responses of single-walled carbon nanotubes: Interplay between the strain-induced energy-gap opening and the pinning of the Fermi leveljournal article10.1063/1.20117812-s2.0-25144447612WOS:000231551700088